Periódicos Internacionais

doi: org/10.1016/j.optlastec.2015.09.002

doi: org/10.1016/j.optlastec.2015.09.002

2018
01 Wirth-Lima A J, Silva M G, and Sombra A S B. Comparisons of electrical and optical properties between graphene and silicene— A review” http://dx.doi.org/10.1088/1674-1056/27/2/023201″>Chin. Phys. B Vol. 27, No. 2 023201, (2018).
DOI 10.1088/1674-1056/27/2/023201
02 E. O. Sancho, E. A. Araújo,W. S. Conde, I. R. Saraiva,R. C. B.Maia,L. M. B.Oliveira,J. C. Sales, A. S.B. Sombra,J. S. V. Albuquerque.Models Manufacturing of Crystal Systems: An Introduction to Ceramic MaterialsMaterials Science Forum Vol. 912, pp 280-284 ., (2018).
DOI 10.4028/www.scientific.net/MSF.912.280
03 C. A. Rodrigues Junior, M. C. Campos Filho, D. G. Sousa, A. J. M. Sales, R. P. S. Leão, A. S. B. Sombra & G. C. Barroso . Structural and electrical properties of the SrBi4Ti4O15: V2O5 matrix in the microwave frequency rangeJournal of Electromagnetic Waves and Applications ISSN: 0920-5071 (Print) 1569-3937 (Online) Pages 1-13 | Published online: 08 Feb 2018, Taylor & Francis Group., (2018).
DOI 10.1080/09205071.2018.1436004
04 F. W. C. Farias, A. S. G. Alves, Y. M. S. Alves, F. M. M. Pereira,M. D. B. Barroso, J. C. Sales and A. S. B. Sombra. Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-OMaterials Science Forum Vol. 912, pp 16-20., (2018).
DOI 10.4028/www.scientific.net/MSF.912.16
05 Y. M. S. Alves, C. H. A. Pereira, F. W. C. Farias, F. M. M. Pereira,M. D. B. Barroso, J. C. Sales and A. S. B. Sombra. Influence of Addition of CaO and SiO2 in Microstructure
of Hexaferrite BaXSr1-XFe12O19Materials Science Forum Vol. 912, pp 21-26., (2018).
DOI 10.4028/www.scientific.net/MSF.912.21
06 D.V.M. Paiva, M.A.S. Silva, A.S.B. Sombra, P.B.A. Fechine. Properties of the Sr3MoO6 electroceramic for RF/microwave devicesJournal of Alloys and Compounds 748 pp 766-773., (2018).
DOI 110.1016/j.jallcom.2018.03.200
07 J.E.V. DE MORAIS, A.J.N. DE CASTRO, R.G.M. OLIVEIRA,F.F. DO CARMO,A.J.M. SALES, J.C. SALES,M.A.S. SILVA,D.X. GOUVEIA,M.M. COSTA, A.R. RODRIGUES and A.S.B. SOMBRA. Magneto Tuning of a Ferrite Dielectric Resonator Antenna Based on LiFe5O8 MatrixJournal of ELECTRONIC MATERIALS,, (2018).
DOI 10.1007/s11664-018-6255-0
08 T. S. M. Fernandes, R. G. M. Oliveira, D. X. Gouveia, M. A. S. Silva, A. S. B.Sombra & R. F. Nascimento. Study of the structural and dielectric properties of ceramic obtained from residual electrocoagulationAdvances in Applied Ceramics Structural, Functional and Bioceramics ISSN: 1743-6753 (Print) 1743-6761 (Online) Journal homepage: http://www.tandfonline.com/loi/yaac20., (2018).
DOI 10.1080/17436753.2018.1462296
09 M. Henrique B. Ju nior, Amarilton L. Magalhaes, A. M. Bastos, A. J. M. Sales,D. X.Gouveia, A. A. Kamshilin,A. C. Ferreira, G. F. Guimaraes,A. S. B. Sombra, J. W. M. Menezes. Piezoelectric ceramic sensor (PZT) applied to electric current measurementsMicrosystem Technologies., (2018).
DOI 10.1007/s00542-018-3998-
10 A. C. Ferreira, C. S. Sobrinho, G. F. Guimaraes,J. R. R. Sousa, J. W. M. Menezes,A. Wirth Lima Jr., M. L. Lyra, A. S. B. Sombra. All-optical logic gates based on XPM effect under the PAM-ASK modulation in a symmetric dual NLDCMicrosystem Technologies., (2018).
DOI 10.1007/s00542-018-4016-x
11 R. G. M. Oliveira, G. S. Batista, J. E. V. de Morais, M. M. Costa ,· M. A. S. Silva,· J. W. O. Bezerra, A. S. B. Sombra. Structural and dielectric behaviour analysis of TiO2 addition on the ceramic matrix BiVO4Journal of Materials Science: Materials in Electronics., (2018).
DOI 10.1007/s10854-018-9590-2
12 Harsimrat Kaur, Charanjeet Singh,Anupma Marwaha, Sukhleen Bindra Narang, Rajshree Jotania,Sanjay R. Mishra, Yang Bai, K. C. James Raju,Dharmendra Singh, Madhav Ghimire,Preksha Dhruv,A. S. B. Sombra. Elucidation of microwave absorption mechanisms in Co–Ga substituted Ba–Sr hexaferrites in X-band.JoJournal of Materials Science: Materials in Electronics., (2018).
DOI.org/10.1007/s10854-018-9638-3
13 R. G. M. Oliveira, D. B. Freitas, G. S. Batista, J. E. V. de Morais, V. C. Martins, M. M. Costa,M. A. S. Silva, D. X. Gouvêa, C. Singh A. S. B. Sombra. Dielectrical and structural studies of composite matrix BiVO4–CaTiO3 and temperature effects by impedance spectroscopy.Journal of Materials Science: Materials in Electronics., (2018).
DOI.org/10.1007/s10854-018-9714-8
14 Marcello X. Façanha, Felipe F. do Carmo, João P.C. do Nascimento Tasso O. Sales, Weslley Q. Santos,, Artur S. Gouveia-Neto, Carlos J. da Silva, Antonio S.B. Sombra. A novel white-light emitting BaBi2Nb2O9: Li+/Tm3+/Er3+/Yb3+upconversion phosphor.Journal of Luminescence 204 / 539–547., (2018).
DOI.org/10.1016/j.jlumin.2018.08.016
15 J.E.V. DE MORAIS , R.G.M. OLIVEIRA, V.L. BESSA,M.A.S. SILVA, M.M. COSTA, D.X. GOUVEIA, J. GOLDSMITH,T.K. CARROLL, and A.S.B. SOMBRA. RF and Microwave Electrical Properties Study of the Magneto-Dielectric Resonator Antenna of the Matrix Composite [SrFe12O19 (SFO)1-x-BiFeO3(BFO)x].Journal of ELECTRONIC MATERIALS, Vol. 47, No. 10., (2018).
DOI.org/10.1007/s11664-018-6507-z
16 Felipe F. do Carmoa, João P.C. do Nascimentoa,, Marcello X. Façanhaa, T.O. Sales,W.Q. Santos, Artur S. Gouveia-Neto, Carlos Jacinto, Antonio S.B. Sombra. White light upconversion emission and color tunability in Er3+/Tm3+/Yb3+tri-doped YNbO4 phosphor.Journal of Luminescence 204 (2018) 676–684., (2018).
DOI.org/10.1016/j.jlumin.2018.08.079
17 J.W.O. BEZERRA, R.G.M. OLIVEIRA, M.A.S. SILVA , T.F. MACIEL,J.C. GOES and A.S.B. SOMBRA. Dielectric Resonator Antennas with Frequency Stability Under
Severe Temperature Variations Based on Li2MgTi3O8 Ceramic Matrix Added with Bi2O3.Journal of ELECTRONIC MATERIALS / The Minerals, Metals & Materials Society., (2018).
DOI.org/10.1007/s11664-018-6664-0
2017
1. P. Toledano, A. P. Ayala, A. F. G. Furtado Filho,J. P. C. do Nascimento, M. A. S. Silva, and A. S. B. Sombra . Magnetoelectric Efects in the Spiral Magnets CuCl2 and CuBr2 ;Journal of Physics: Condensed Matter., (2017) Volume 29, 035701
DOI 10.1088/1361-648X/29/3/035701
2. F.A.A. Aguiar, A.J.M. Sales, B.S. Araujo, K.D.A. Saboia,  M.C. Campos Filho, A.S.B. Sombra, A.P. Ayala, and P.B.A. Fechine . Effect of V2O5 Addition on the Phase Composition of
Bi5FeTi3O15 Ceramic and RF/Microwave Dielectric Properties ;Journal of ELECTRONIC MATERIALS., (2017) Volume 46, No. 4
DOI 10.1007/s11664-017-5312-4
3. P.W.S. Oliveira, G.F.M. Pires Junior, A.J.M. Sales, H.O. Rodrigues, and A.S.B. Sombra . Experimental and numerical investigation of the microwave dielectric properties of the MgTiO3 ceramic matrix added with CaCu 3Ti 4O12 ;Journal of Microwaves, Optoelectronics and Electromagnetic Applications., (2017) Volume 16, No. 2
DOI 10.1590/2179-10742017v16i2794
4. J.C. Sales , A.F.G.F. Filho, A.C. Ferreira, J.R.R. Sousa, C.S. Sobrinho, J.W.M. Menezes ,G.F. Guimarães, A.S.B. Sombra . All-optical XOR and OR by Mach-Zehnder Interferometer engineered
photonic crystal fibers ;Optics and Laser Technology ., (2017) Volume 94.
DOI 10.1016/j.optlastec.2017.03.012
5. A. J. Wirth L., A. C. Ferreira,A. S. B. Sombra . AlNonlinear graphene-based nanophotonic switch working in dense wavelength division multiplexing (DWDM) systems;Appl. Phys. A ., (2017).
DOI 10.1007/s00339-017-0979-1
6. J.E.V. DE MORAIS, R.G.M. DE OLIVEIRA, A.J.N. DE CASTRO,J.C. SALES, M.A.S. SILVA, J.C. GOES, M.M. COSTA and A.S.B. SOMBRA. Dielectric Study in the Microwave Range for Ceramic Composites Based on Sr2CoNbO6 and TiO2 Mixtures;Journal of ELECTRONIC MATERIALS., (2017).
DOI 10.1007/s11664-017-5541-6
7. M. V. N. Oliveira, A. G. Coelho Jr, C. S. Sobrinho, A. C. Ferreira,J. C. Sales, J. R. R. Sousa, G. F. Guimarães, J. W. M. Menezes,M. L. Lyra, A. S. B. Sombra. A new modulation method to generate all‑optical logic gates in na AOTF;Microsyst Technol, Springer-Verlag Berlin Heidelberg ., (2017).
DOI 10.1007/s00542-017-3352-6
8. J.M.S. FILHO, C.A. RODRIGUES JUNIOR, D.G. SOUSA,R.G.M. OLIVEIRA, M.M. COSTA, G.C. BARROSO, and A.S.B. SOMBRA. Impedance Spectroscopy Analysis of Mg4Nb2O9 Ceramics with Different Additions of V2O5 for Microwave and Radio Frequency Applications;Journal of ELECTRONIC MATERIALS ., (2017).
DOI 10.1007/s11664-017-5324-0
9. A. E. C. Junior, J. P. F. Mota, S. M. A. Pontes, F. J. N. Maia,C. S. Clemente, P. B. A. Fechine,F. Bohn, A. J. M. Sales, A. S. B. Sombra.A self-assembly of graphene oxide@Fe3O4/metallophthalocyaninenanohybrid materials: synthesis, characterization, dielectric and thermal properties J Mater Sci, Composites- SPRINGER., (2017).
DOI 10.1007/s10853-017-1133-3
10 R.G.M. Oliveira, J.W.O. Bezerra , J.E.V. de Morais, M.A.S. Silva, J.C. Goes, M.M. Costa, A.S.B. Sombra .Identification of giant dielectric permittivity in the BiVO4J Mater Sci, Composites- SPRINGER., (2017).
DOI 10.1016/j.matlet.2017.05.105
11 V. G. P. Ribeiro, A. M. P. Marcelo, K. T. Silva, F. L. F. Silva 1, J. P. F. Mota , J. P. C. Nascimento , A. S. B. Sombra , C. S. Clemente, G. Mele, L. Carbone and S. E. Mazzetto . New ZnO@Cardanol Porphyrin Composite Nanomaterials with Enhanced Photocatalytic Capability under Solar Light IrradiationJ Materials, 10, 1114., (2017).
DOI 10.3390/ma10101114
12 .Wirth Lima, & A.S.B. Sombra. Graphene-based Mach–Zehnder nanophotonics interferometer working as a splitter/switch and as a multiplexer/demultiplexerOpt Quant Electron ,49: 388., (2017).
DOI 10.1007/s11082-017-1227-9
13 .G. S. Batista, R. G. M. Oliveira,M. A. S. Silva, M. M. Costa, J. C. Goes,D. X. Gouveia, and A. S. B. Sombra. Communication—Detection of Giant Dielectric Constant in Strontium Orthovanadate Sr3V2O8ECS Journal of Solid State Science and Technology ,6 (10) N213-N215 The Electrochemical Society., (2017).
DOI 10.1149/2.0231710jss
14 .M. P. F. Graça, L. C. Costa, F. Amaral, M. A. Valente, W. M. Barcellos, F. N. A.Freire, K. D. A. Sabóia & A. S. B. Sombra. Dielectric and magnetic properties of a yttrium ferrite/calcium copper titanate compositeSPECTROSCOPY LETTERS ,VOL. 50, NO. 4, 206–213., (2017).
DOI 10.1149/2.0231710jss
15 P.M.V. Almeida, C.B. Gozzo, E.H.N.S. Thaines , A.J.M. Sales , R.G. Freitas , A.J. Terezo, A.S.B. Sombra , M.M. Costa. Dielectric relaxation study of the ceramic matrix BaBi4Ti4O15:Bi2O3Materials Chemistry and Physics 205, 72-83., (2018).
DOI 10.1016/j.matchemphys.2017.10.069
16 J.E.V. de Morais, R.G.M. Oliveira, M.A.S. Silva , M.M. Costa, A.J.M. Sales ,V.L. Bessa, A.R. Rodrigues , I.F. Vasconcelos, J. Goldsmith, T.K. Carroll ,A.S.B. Sombra . Magneto-dielectric properties studies of the matrix composite[SrFe12O19(SFO)1-X e BiFeO3(BFO)X], (2018).
DOI 10.1016/j.jallcom.2017.11.116
2016
1. A.Wirth L. Jr., M.G. da Silva , D.M.C. Neves and Antonio Sergio Bezerra Sombra.Nanophotonic graphene-based racetrack-resonator add/drop filter.Optics Communications., 366 (2016) 210–220. Elsevier B.V.
doi: 10.1016/j.optcom.2015.12.054
2. A.C. Ferreira, A.G. Coêlho Jr, J.R.R. Sousa, C.S. Sobrinho, F.T.C.B. Magalhães, A.F.G.F. Filho, G.F. Guimarães, J.C. Sales, J.W.M. Menezes, A.S.B. Sombra . PAM–ASK optical logic gates in an optical fiber Sagnac interferometer . Published by Elsevier Ltd Optics & Laser Technology., 77 (2016) 116–125.
3. R.G.M. Oliveira, D.B. Freitas, M.C. Romeu,M.A.S. Silva, A. J. M. Sales,A.S.B. Sombra . Design and simulation OF Na2Nb4O11 dieletric resonator antenna added with Bi2O3 for microwave applications. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Wiley., 58 (2016) 1211-1217.
doi: 10.1002/mop.29765
4. A.J.M. Sales, D.G. Sousa, H.O. Rodrigues, M.M. Costa, F.N.A. Freire, M.J. Soares, M.P.F. Graça, J. Suresh Kumare, A.S.B. Sombra. Power dependent upconversion in Er3þ/Yb3þ co-doped BiNbO4 phosphors. Ceramics International, Elsevier., 42 (2016) 6899–6905.
doi: 10.1016/j.ceramint.2016.01.075
5. L. N. L. Oliveira, R. V. B. Campos, D. X. Gouveia, M. A. S. Silva, and A. S. B. Sombra. MICROWAVE DIELECTRIC PROPERTIES STUDY OF (Al2O3)-(Nb2O5) COMPOSITE FOR DIELECTRIC RESONATOR ANTENNA APPLICATIONS. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Wiley., 58 (2016) 1473-149.
doi: 10.1002/mop.29816
6. V. M. Paiva,M. A. S. Silva,A. S. B. Sombrab and P. B. A. Fechine. Dielectric investigation of the Sr3WO6 double perovskite at RF/microwave frequencies. RSC Adv.Royal Society of Chemistry., (2016) 6, 42502-42509 .
doi: 10.1039/c6ra04640a
7. Francisco Nivaldo Aguiar Freire, Manoel Roberval Pimentel Santos,Hélio Henrique Barbosa Rocha, Ana Fabiola Leite Almeida, Selma Elaine Mazzetto, Antonio Jefferson Mangueira Sales, Antonio Sergio Bezerra Sombra. The Thermal Stability of (CaTiO3)1−x (Cr3/4Fe5/4O3)x Ceramic Composites in the Microwave Region. Materials Sciences and Applications., (2016) 7, 202-209.
doi: 10.4236/msa.2016.74020
8. B. Mettout,P. Toledano, A. S. B. Sombra, A. F. G. Furtado Filho, J. P. C. do Nascimento, M. A. Santos da Silva, P. Gisse and H. Vasseur. Magnetoelectric, photovoltaic, and magnetophotovoltaic effects in KBiFe2O5Bone Cement: A Review. Biointerface Research in Applied Chemistry Volume 6, Issue 3, 2016, 1243-1256.
9. Lídia Raquel C. Aquino , Ana Angélica M., Antônio S. B. Sombra, C. C. Silva. Bone Cement: A Review. PHYSICAL REVIEW B., 93, 195123 (2016).
10. C. C. Silva, A. S. B. Sombra, M. P. F. Graça. SiO2–Fe2O3–MoO3 ceramic system doped with Nb2O5, a study of the dielectric temperature dependence. Journal of Materials Science: Materials in Electronics,June., (2016) Volume 27, Issue 6, pp 5764–5769
DOI 10.1007/s10854-016-4490-9
11. Juner M. Vieira, Marcelo P. Magalhaes, Marcos V. T. Heckler, Joao C. M. Mota and Antonio S. B. Sombra. Development of an UHF 2 × 2 Microstrip Antenna Array for Nano- Satellites. JOURNAL OF COMMUNICATION AND INFORMATION SYSTEMS., (2016) Volume 31, NO. 1, pp 137-143
DOI 10.14209/jcis.2016.13
12. D. G. Correia, J. C. Sales, P. V. F. Pinto, L. P. Moura, A. C. Ferreira, J. W. M. Menezes, G. F. Guimarães, A. S. B. Sombra. Analysis of the Performance of a PAM/PPM/OOK System Operating with OCDMA, under Nonlinear Optical Effects in Optical Fiber Propagation. Journal of Optical Communications., (2016) Volume 37, Issue 2, Pages 233–246
DOI 10.1515/joc-2015-0053
13. S. G. C. Moreira,K. Pavani,M. J. Soares,M. P. F. Graça,e J. Suresh Kumar and A. S. B. Sombra. Temperature-, power-, and concentrationdependent two and three photon upconversion in Er3+/Yb3+ co-doped lanthanum ortho-niobate phosphors. Royal Society of Chemistry Advances., (2016) Volume 6, 61680
DOI 10.1039/c6ra12941b
14. M.X. Façanha, J.P.C.doNascimento, M.A.S.Silva, M.C.C.Filho, A.N.L.Marques,A.G.Pinheiro f, A.S.B.Sombra . Up-conversion emission of Er3/Yb3 co-doped BaBi2Nb2O9 (BBN) phosphors ;Journal ofLuminescence183., (2016) Volume 183, 102–107
DOI 10.1016/j.jlumin.2016.08.011
15. Jose L. da Silva, Humberto D. de Andrade, Anamaria S. Maia, Humberto C. C. Fernandes,Isaac B. T. da Silva, Antonio S. B. Sombra and Jonathan P. P. Pereira . PERFORMANCE OF MICROSTRIP PATCH ANTENNA DUE EBG/PBG ARRANGEMENTS INSERTION ;MICROWAVE AND OPTICAL TECHNOLOGY LETTERS ., (2016) Vol. 58, No. 12, 2933-2937
DOI 10.1002/mop
16. J. C. Sales, T. M. Pessoa, A. C. Ferreira, D. G. Correia, C. S. Sobrinho, J. S. de Almeida, J. W. M. Menezes, G. F. Guimarães & A. S. B. Sombra . High quality of logic gates from the return arm of a Sagnac fiber interferometer ;Journal of Electromagnetic Waves and Applications., (2016) Volume 30, 2016 – Issue 18 Pages 2459-2483

http://dx.doi.org/10.1080/09205071.2016.1257396

17. R. G. M. Oliveira, A. J. M. Sales,J. P. C. Nascimento, J. W. M. Menezes, M. A. S. Silva, and A. S. B. Sombra . Compact Triple-Babd Pifa With High Bandwidth And Gain For Multiple Mobile Services ;Microwave Opt Technol Lett 58:2960–2965., (2016.)Volume 58, Pages 2459-2483

http://dx.doi.org/10.1088/1361-648X/29/3/035701.

2015
1. MALLMANN, E. J. J. ; SILVA, M. A. S. ; SOMBRA, A. S. B. ; BOTELHO, M. A. ; MAZZETTO, S. E. ; DE MENEZES, A. S. ; ALMEIDA, A. F. L. ; FECHINE, P. B. A. . Dielectric Properties of Ca0.7Bi0.3Ti0.7Cr0.3O3 (CBTC)-CaCu3Ti4O12 (CCTO) Composite. Journal of Electronic Materials, v. 44, p. 295-302, 2015.
2. BEZERRA, JOSE W. O. ; SOUSA, D. G. ; JUNQUEIRA, C. C. M. ; SILVA, MARCELO A. S. ; BARROSO, G. C. ; SOMBRA, ANTONIO S. B. . Circularly polarized quarter-cylinder-shaped dielectric resonator antenna using a single probe feed. Microwave and Optical Technology Letters, v. 57, p. 722-726, 2015.
3. Filho, A. F. G. F. ; MENDES, A. G. L. S. O. ; SOUSA, J. R. R. ; BATISTA, G. S. ; BASTOS, A. M. ; Sobrinho, C. S. ; LYRA, M. L. ; SOMBRA, A. S. B. . Periodic Modulation of Nonlinearity in a Two-Core Photonic Crystal Fiber: A Numerical Investigation. Journal of Electromagnetic Analysis and Applications, v. 07, p. 41-51, 2015.
4. Almir Wirth Lima Jr. João Cesar Moura Mota and Antonio Sergio Bezerra Sombra Beilstein J.. Attenuation, dispersion and nonlinearity effects in graphene-based waveguides Nanotechnol. 2015, 6, 1221–1228.
doi:10.3762/bjnano.6.125
5. N.D.G. SOUZA , R.M. FREIRE , A.P. CUNHA , M.A.S. DA SILVA, S.E. MAZZETTO, A.S.B. SOMBRA, J.C. DENARDIN , N.M.P.S. RICARDO , P.B.A. FECHINE -New magnetic nanobiocomposite based in galactomannan/glycerol and superparamagnetic nanoparticles. Materials Chemistry and Physics 156 (2015) 113e120
6. D.V.M. PAIVA, M.A.S. SILVA , T.S. RIBEIRO, I.F. VASCONCELOS , A.S.B. SOMBRA, J.C. GÓES, P.B.A. Fechine -Novel magnetic–dielectric composite ceramic obtained from Y3Fe5O12
and CaTiO3.Journal of Alloys and Compounds 644 (2015) 763–769
7. L. S. OLIVEIRA, D. X. GOUVEIA, M. A. S. SILVA,A. S. B. SOMBRA -Study of the performance of dieletric resonator antennas based on the matrix com composite of  Al2O3 – CaTiO3 Microwave and optical technology letters / Vol. 57, No. 4, April 2015
DOI 10.1002/mop
8. R.V.B. Campos, C.L. Bezerra, L.N.L. Oliveira, D.X. Gouveia, M.A.S. Silva and A.S.B. Sombra -A Study of the Dielectric Properties of Al2O3–TiO2 Composite in the Microwave and RF RegionsJournal of Eletronic Materials, Vol. 44, No. 11 ,p. 4220-4226, 2015.
9. J. C. Sales, A. F. G. F. Filho,A. C. Ferreira,J. R. R. Sousa,K. M. V. Avila,J. C. Sales,D. N. S. Cavalcante, F. T. C. B. Magalhaes,C. S. Sobrinho P. V. F. Pinto, G. F. Guimaraes, J. W. M. Menezes,D. B. Costa, A. S. B. Sombra-Mach–Zehnder nonlinear interferometer in photonic crystal fibers with nonlinearity profilesJournal of Nonlinear Optical Physics & Materials, Vol. 24, No. 3, 1550036 (17 pages), 2015.
2014
1. OLIVEIRA, R. G. M. ; ROMEU, M. C. ; COSTA, M. M. ; SILVA, P. M. O ; FILHO, J. M. S. ; JUNQUEIRA, C. C. M. ; SOMBRA, A. S. B. . Impedance spectroscopy study of Na2Nb4O11 ceramic matrix by the addition of Bi2O3. Journal of Alloys and Compounds , v. 584, p. 295-302, 2014.
2. SILVA, P. M.O. ; FERNANDES, T. S. M. ; OLIVEIRA, R. M. G. ; SILVA, M. A. S. ; SOMBRA, A. S. B. . Radiofrequency and microwave properties study of the electroceramic BaBi4Ti4O15. Materials Science and Engineering: B, v. 182, p. 37-44, 2014.
3. WIRTH LIMA, A. ; SOMBRA, A. S. B. . Graphene-photonic crystal switch. Optics Communications, v. 321, p. 150-156, 2014.
4. SOUSA, J.R.R. ; FILHO, A. F. G. F. ; FERREIRA, A. C. ; BATISTA, G. S. ; SOBRINHO, C. S. ; BASTOS, A. M. ; LYRA, M. L. ; SOMBRA, A. S. B. . Generation of logic gates based on a photonic crystal fiber Michelson interferometer. Optics Communications, v. 322, p. 143-149, 2014.
5. BASTOS, A. M. ; MENEZES, J. W. M. ; KAMSHILIN, A. A. ; SOMBRA, A. S. B. . Hybrid Opto-Mechanical Current Sensor Based on a Mach-Zehnder Fiber Interferometer. IEEE Sensors Journal, v. 14, p. 1056-1060, 2014.
6. COSTA, M. B. C. ; BASTOS, A. M. ; COELHO, A. G. ; Sobrinho, C. S. ; LYRA, M. L. ; SOMBRA, A. S. B. . High Contrast Optical -OR- Logic Gates Using a Photonic Crystal Fiber Modulated by PAM-ASK. Journal of Optical Communications, v. 35, p. 1-10, 2014.
7. SOUSA, D. G. ; SARAIVA, G. D. ; Filho, J. M. S. ; FILHO, J. M. ; SOMBRA, A. S. B. . Dielectric and microwave properties study of TiFeNbO6 ceramics added Bi2O3. Journal of Materials Science: Materials in Electronics, v. 25, p. 4450-4457, 2014.
8. LIMA, A. WIRTH ; SOMBRA, A. S. B. . A nanophotonic switching cell. Journal of Optics, v. 16, p. 105005, 2014.
2013
1. MACÊDO, A.A.M. ; SOMBRA, A.S.B. ; MAZZETTO, S.E. ; SILVA, C.C. . Influence of the polysaccharide galactomannan on the dielectrical characterization of hydroxyapatite ceramic. Composites Part B: Engineering, v. 44, p. 95-99, 2013.
2. COELHO, A. G. ; QUEIROZ, A. S. B. ; SILVA, M. G. ; LYRA, M. L. ; SOMBRA, A. S. B. . Switching and enhanced bistability in an asymmetric nonlinear directional coupler with a metamaterial channel. Communications in Nonlinear Science and Numerical Simulation , v. 18, p. 1258-1268, 2013.
3. COELHO, A. G. ; COSTA, M. B. C. ; FERREIRA, A. C. ; SILVA, M. G. ; LYRA, M. L. ; SOMBRA, A. S. B. . Realization of All-Optical Logic Gates in a Triangular Triple-Core Photonic Crystal Fiber. Journal of Lightwave Technology, v. 31, p. 731-739, 2013.
4. GUIMARÃES, G. F. ; BASTOS, A. M. ; FERREIRA, A. C. ; QUEIROZ, A. S. B. ; MENEZES, J.W.M. ; DE SOUSA, J. R. R. ; SOMBRA, A. S. B. . Analysis of the Performance of Optical Code-Division Multiple-Access System (OCDMA), Operating with Gold Codes under Nonlinear Effects. Journal of Electromagnetic Analysis and Applications, v. 5, p. 49-57, 2013.
5. ROCHA, G.N. ; MELO, L.F.L. ; DANTAS, S.M. ; AYALA, A.P. ; SOMBRA, A.S.B. ; ALMEIDA, A.F.L. ; MENEZES, A.S. ; FECHINE, P.B.A. . Preparation and Study of Bismuth Rare-Earth Tungstate Composite Screen-Printed Thick Films. Journal of Electronic Materials, v. 42, p. 752-760, 2013.
6. MALLMANN, E. J. J. ; SOMBRA, A. S. B. ; GOES, J. C. ; FECHINE, P. B. A. . Yttrium Iron Garnet: Properties and Applications Review. Solid State Phenomena, v. 202, p. 65-96, 2013.
7. SANCHO, E. O. ; SILVA, P. M. O. ; JÚNIOR, G. F. M. PIRES ; RODRIGUES, H. O. ; FREITAS, D. B. ; SOMBRA, A. S. B. . High dielectric permittivity of SrBi2Nb2O9(SBN) added Bi2O3 and La2O3. Journal of Electroceramics, v. 30, p. 119-128, 2013.
8. RODRIGUES, H. O. ; SALES, A. J. M. ; PIRES JUNIOR, G. F. M. ; ALMEIDA, J. S. ; SILVA, M. A. S. ; SOMBRA, A. S. B. . Experimental and Numerical Investigation of Dielectric Resonator Antenna Based on the Bifeo3 Ceramic Matrix Added with Bi2o3 Or Pbo. Journal of Alloys and Compounds, v. 576, p. 324-331, 2013.
9. PEREIRA, F. M. M. ; SOMBRA, A. S. B. . A Review on BaxSr1-xFe12O19 Hexagonal Ferrites for use in Electronic Devices. Solid State Phenomena, v. 202, p. 1-64, 2013.
10. RODRIGUES, C. A. ; FILHO, J. M. S. ; SILVA, P. M. O. ; SILVA, M. A. S. ; JUNQUEIRA, C. C. M. ; SOMBRA, A. S. B. . High dielectric permittivity and low loss of SrBi4Ti4O15 with PbO and V2O5 additions for RF and microwave applications. Journal of Materials Science: Materials in Electronics, v. 24, p. 3467-3473, 2013.
11. PINHEIRO, A. G. ; SARAIVA, G. D. ; MENDES FILHO, J. ; SOMBRA, A. S. B. . Preparation of Bi4Ti3O12 (BIT) Ceramics via a High-Energy Ball Milling Process Doped with Multi-Walled Carbon Nanotubes (MWNTs). Materials Sciences and Applications, v. 04, p. 549-555, 2013.
12. ROMEU, M. C. ; OLIVEIRA, R. G. M. ; SALES, A. J. M. ; SILVA, P. M. O. ; Filho, J. M. S. ; COSTA, M. M. ; SOMBRA, A. S. B. . Impedance spectroscopy study of TiO2 addition on the ceramic matrix Na2Nb4O11. Journal of Materials Science: Materials in Electronics, v. 24, p. 4993-4999, 2013 .
2012
1. FERREIRA, A.C. ; COSTA, M. B. C. ; COÊLHO, A. G. ; SOBRINHO, C. S. ; LIMA, J. L. S. ; MENEZES, J. W. M. ; LYRA, M. L. ; SOMBRA, A. S. B. . Analysis of the nonlinear optical switching in a Sagnac interferometer with non-instantaneous Kerr effect.Optics Communications, v. 285, p. 1408-1417, 2012.
2. ROCHA, M. J. S. ; FILHO, M. C. C. ; THEOPHILO, K. R. B. ; Denardin, J.C. ; VASCONCELOS, I. F. ; ARAUJO, E. B. ; SOMBRA, A. S. B. . Ferrimagnetism and Ferroelectricity of the Composite Matrix: SrBi2Nb2O9 (SBN)X-BaFe12019(BFO)100–X;. Materials Sciences and Applications, v. 03, p. 6-17, 2012.
3. FURTADO FILHO, A. G. ; SOUSA, J. R. R. ; MORAIS NETO, A. F. ; MENEZES, J. W. M. ; SOMBRA, A. S. B. . Periodic Modulation of Nonlinearity in a Fiber Bragg Grating: A Numerical Investigation. Journal of Electromagnetic Analysis and Applications, v. 04, p. 53-59, 2012.
4. SABOIA, K. D. A. ; QUEIROZ, A. S. B. ; LIMA, F. T. ; SARAIVA SOBRINHO, C. ; MENEZES, J. W. M. ; SOMBRA, A. S. B. . Optical Bistability in an Acousto-Optic Tunable Filter (AOTF) Operating with Short Optical Pulses. Journal of Electromagnetic Analysis and Applications, v. 04, p. 112-117, 2012.
5. ROCHA, G. N. ; MELO, L. F. L. ; DA SILVA, M. A. S. ; SILVA, P. V. S. ; SOMBRA, A. S. B. ; FECHINE, P. B. A. . Study of the performance of dielectric resonator antennas based on the matrix BiREWO6 [RE = Gd, Y, Nd]. Microwave and Optical Technology Letters, v. 54, p. 18-23, 2012.
6. LIMA, A. W. ; SOMBRA, A. S. B. . Photonic crystal electro-optical switching cell. Optics Communications, v. 285, p. 3195-3201, 2012.
7. ROCHA, M. J. S. ; SILVA, P. M. O. ; THEOPHILO, K. R. B. ; SANCHO, E. O. ; PAULA, P. V. L. ; SILVA, M. A. S. ; HONORATO, S. B. ; SOMBRA, A. S. B. . High dielectric permittivity in the microwave region of SrBi2Nb2O9 (SBN) added La2O3, PbO and Bi2O3, obtained by mechanical alloying. Physica Scripta, v. 86, n. 2/025701, p. 1-9, 2012.
8. SALES, A.J.M. ; OLIVEIRA, P.W.S. ; ALMEIDA, J.S. ; COSTA, M.M. ; RODRIGUES, H.O. ; SOMBRA, A. S. B. . Copper concentration effect in the dielectric properties of BiNbO4 for RF applications. Journal of Alloys and Compounds, v. 542, p. 264-270, 2012.
9. SILVA, M. A. S. ; FERNANDES, T. S. M. ; SOMBRA, A. S. B. . An alternative method for the measurement of the microwave temperature coefficient of resonant frequency (τf). Journal of Applied Physics, v. 112, p. 074106, 2012.
10. WIRTH LIMA JR, A. ; SOMBRA, A. S. B. . Random photonic crystal optical memory. Journal of Optics, v. 14, p. 105402, 2012.
11. MENEZES, J. W. M. ; SOUSA, J. R. R. ; COSTA, M. B. C. ; FERREIRA, A. C. ; LIMA, F. T. ; SOBRINHO, C. S. ; LYRA, M. L. ; SOMBRA, A. S. B. . Numerical analysis of the instantaneous and relaxed KERR model for generation of the all-optical logic gates with Triangular Fiber Coupler (TFC). Journal of Nonlinear Optical Physics & Materials, v. 21, p. 1250037, 2012.
12. HAAPALAINEN, M. ; GIROLAMO, S. ; SOMBRA, A. S. B. ; ROMASHKO, R. V. ; KAMSHILIN, A. A. . Contactless Adaptive Fiber-Optic Sensor for Measurement of Electrical Alternating Currents. Pacific Science Review, v. 14, p. 327-330, 2012.
2011
1. RODRIGUES, H.O. ; PIRES JUNIOR, G.F.M. ; SALES, A.J.M. ; SILVA, P.M.O. ; COSTA, B.F.O. ; ALCANTARA, P. ; MOREIRA, S.G.C. ; SOMBRA, A. S. B. . BiFeO3 ceramic matrix with Bi2O3 or PbO added: Mössbauer, Raman and dielectric spectroscopy studies.Physica B: Condensed Matter, v. 406, p. 2532-2539, 2011.
2. LIMA, A. WIRTH ; SOMBRA, A. S. B. . Photonic crystal optical memory. Applied Physics A: Materials Science & Processing, v. 103, p. 521-524, 2011.
3. COSTA, M. M. ; PIRES, G. F. M. ; TEREZO, A. J. ; GRAÇA, M. P. F. ; SOMBRA, A. S. B. . Impedance and modulus studies of magnetic ceramic oxide Ba2Co2Fe12O22 (Co2Y) doped with Bi2O3. Journal of Applied Physics, v. 110, p. 034107-034107-7, 2011.
4. COSTA, M.M. ; SOHN, R.S.T.M. ; MACÊDO, A.A.M. ; MAZZETTO, S.E. ; GRAÇA, M.P.F. ; SOMBRA, A. S. B. . Study of the temperature and organic bindings effects in the dielectric and structural properties of the lithium ferrite ceramic matrix (LiFe5O8).Journal of Alloys and Compounds, v. 509, p. 9466-9471, 2011.
5. MALLMANN, E. J. J. ; GOES, J. C. ; FIGUEIRO, S. D. ; RICARDO, N. M. P. ; DENARDIN, J.C. ; SOMBRA, A. S. B. ; MAIA, F. J. N. ; MAZZETTO, S. E. ; FECHINE, P. B. A. . Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites. Express Polymer Letters, v. 5, p. 1041-1049, 2011.
6. SILVA, C. C. ; SOMBRA, A. S. B. . Temperature Dependence of the Magnetic and Electric Properties of Ca2Fe2O5. Materials Sciences and Applications, v. 02, n. 9, p. 1349-1353, 2011.
7. COSTA, A. D. S. B. ; COSTA, R. C. S. ; AMARANTE, F. W. O. ; FERNANDES, T. S. M. ; SARAIVA, G. D. ; SILVA, M. A. S. ; SOMBRA, A. S. B. . High thermal stability of the microwave dielectric properties of CaTi1−x(Nb2/3Li1/3)xO3− alloys. Physica Scripta, v. 84, n. 5/055701, p. 1-7, 2011.
8. COSTA, A. D. S. B. ; ROMEU, M. C. ; COSTA, R. C. S. ; FERNANDES, T. S. M. ; AMARANTE, F. W. O. ; SILVA, M. A. S. ; SARAIVA, G. D. ; SOMBRA, A. S. B. . HIGH THERMAL STABILITY OF MICROWAVE DIELECTRIC PROPERTIES OF CaTi1-X(Nb 1/2FeLi1/2)XO3 CERAMICS. Journal of Advanced Dielectrics, v. 1, n. 4, p. 1-11, 2011.
9. MENEZES, J. W. M. ; FRAGA, W. B. ; LIMA, F. T. ; GUIMARÃES, G. F. ; FERREIRA, A. C. ; LYRA, M. L. ; SOMBRA, A. S. B. .Study of the Performance of an All-Optical Half-Adder Based on Three-Core Non-Linear Directional Fiber Coupler Under Delayed and Instantaneous Non-Linear Kerr Responses. Fiber and Integrated Optics, v. 30, n. 3, p. 201-230, 2011.
10. VALENTE, M.A. ; PERES, M. ; NICO, C. ; MONTEIRO, T. ; GRAÇA, M.P.F. ; SOMBRA, A. S. B. ; SILVA, C.C. . Morphological, structural, optical and dielectric properties of 91SiO2:4Li2O:4Nb2O5:1Dy2O3 (% mole) glass prepared by sol gel. Optical Materials, v. 33, p. 1964-1969, 2011.
11. ALMEIDA, J. S. ; FERNANDES, T. S. M. ; SALES, A. J. M. ; SILVA, M. A. S. ; Júnior, G. F. M. P. ; RODRIGUES, H. O. ; SOMBRA, A. S. B. . Study of the structural and dielectric properties of Bi2O3 and PbO addition on BiNbO4 ceramic matrix for RF applications.Journal of Materials Science: Materials in Electronics, v. 22, p. 978-987, 2011.
2010
1. LIMA JUNIOR, A. W. ; SOMBRA, A. S. B. . Full Analysis of an All-Optical Photonic Crystal Switch. International Journal of Nanoscience, v. 9, p. 57-67, 2010.
2. PIRES JÚNIOR, G.F.M. ; RODRIGUES, H.O. ; ALMEIDA, J.S. ; SANCHO, E.O. ; GÓES, J.C. ; COSTA, M.M. ; DENARDIN, J.C. ; SOMBRA, A. S. B. . Study of the dielectric and magnetic properties of Co2Y, Y-type hexaferrite (Ba2Co2Fe12O22) added with PbO and Bi2O3 in the RF frequency range. Journal of Alloys and Compounds, v. 493, p. 326-334, 2010.
3. GRAÇA, M.P.F. ; SILVA, C.C. ; COSTA, L.C. ; SOMBRA, A. S. B. ; VALENTE, M.A. . Dielectric and structural properties of SiO2-LiFe5O8 glass ceramics prepared by sol gel processing. Journal of Non-Crystalline Solids, v. 356, p. 607-610, 2010.
4. SILVA, C.C. ; GOUVEIA, D.X. ; GRAÇA, M.P.F. ; COSTA, L.C. ; SOMBRA, A. S. B. ; VALENTE, M.A. . Study of the structural and dielectric properties of xLiFe5O8?(100?x) LiNbO3 composites, processed using microwave energy. Journal of Non-Crystalline Solids, v. 356, p. 602-606, 2010.
5. VALENTE, M.A. ; SILVA, C.C. ; SOMBRA, A. S. B. ; GRAÇA, M.P.F. . Dielectric spectroscopy of LiNbO3 and TmNbO4 nanocrystals embedded in a SiO2 glass matrix. Journal of Non-Crystalline Solids, v. 356, p. 800-804, 2010.
6. COSTA, M.M. ; PIRES JÚNIOR, G.F.M. ; SOMBRA, A. S. B. . Dielectric and impedance properties’ studies of the of lead doped (PbO)-Co2Y type hexaferrite (Ba2Co2Fe12O22 (Co2Y)). Materials Chemistry and Physics, v. 123, p. 35-39, 2010.
7. MENEZES, J. W. M. ; FRAGA, W. B. ; FERREIRA, A. C. ; GUIMARAES, G. F. ; Filho, A. F. G. F. ; Sobrinho, C. S. ; SOMBRA, A. S. B. . All-Optical Half-Adder Using All-Optical XOR and AND Gates for Optical Generation of “Sum” and “Carry”. Fiber and Integrated Optics, v. 29, p. 254-271, 2010.
8. FILHO, A. F. G. F. ; DE SOUSA, J. R. R. ; GUIMARAES, G. F. ; ROCHA, H. H. B. ; FERREIRA, A. C. ; LIMA, F. T. ; SOMBRA, A. S. B. . Add-Drop Demultiplexer Operating in an Optical Michelson Interferometer Based in Fiber Bragg Gratings for Time Division Multiple Access Systems. Fiber and Integrated Optics, v. 29, p. 239-253, 2010.
9. RODRIGUES, H.O. ; PIRES JUNIOR, G.F.M. ; ALMEIDA, J.S. ; SANCHO, E.O. ; FERREIRA, A.C. ; SILVA, M.A.S. ; SOMBRA, A. S. B. . Study of the structural, dielectric and magnetic properties of Bi2O3 and PbO addition on BiFeO3 ceramic matrix. Journal of Physics and Chemistry of Solids, v. 71, p. 1329-1336, 2010.
10. CANABARRO, A. A. ; SANTOS, B. ; GLERIA, IRAM ; LYRA, M. L. ; SOMBRA, A. S. B. . Interplay of XPM and nonlinear response time in the modulational instability of copropagating optical pulses. Journal of the Optical Society of America B, v. 27, p. 1878-1885, 2010.
11. VERÍSSIMO, D.M. ; LEITÃO, R.F.C. ; RIBEIRO, R.A. ; FIGUEIRÓ, S.D. ; SOMBRA, A. S. B. ; GÓES, J.C. ; BRITO, G.A.C. . Polyanionic collagen membranes for guided tissue regeneration: Effect of progressive glutaraldehyde cross-linking on biocompatibility and degradation. Acta Biomaterialia, v. 6, p. 4011-4018, 2010.
12. COSTA, M.M. ; TEREZO, A.J. ; MATOS, A.L. ; MOURA, W.A. ; GIACOMETTI, JOSÉ A. ; SOMBRA, A. S. B. . Impedance spectroscopy study of dehydrated chitosan and chitosan containing LiClO4. Physica B: Condensed Matter, v. 405, p. 4439-4444, 2010.
13. ESMERALDO, M. A. ; BARRETO, A. C. H. ; FREITAS, J. E. B. ; FECHINE, P. B. A. ; SOMBRA, A. S. B. ; CORRADINI, E. ; MELE, G. ; MAFFEZZOLI, A. ; MAZZETTO, S. E. . Dwarf-green coconut fibers: a versatile natural renewable raw bioresource. Treatment, morphology and physicochemical properties. Bioresources, v. 5, p. 2478-2501, 2010.
14. PEREIRA, F. M. M. ; SOHN, R. S. T. M. ; RODRIGUES, H. O. ; JÚNIOR, G. F. M. P. ; THEOPHILO, K. R. B. ; ROCHA, M. J. S. ; SILVA, M. A. S. ; SOMBRA, A. S. B. . Experimental and numerical investigation of a magnetic resonator antenna based on the m-type hexaferrite (BaxSr12xFe12O19). Microwave and Optical Technology Letters, v. 52, p. 452-458, 2010.
15. SOHN, R S T M ; MACÊDO, A A M ; COSTA, M M ; MAZZETTO, S E ; SOMBRA, A. S. B. . Studies of the structural and electrical properties of lithium ferrite (LiFe5O8). Physica Scripta, v. 82, p. 055702-055708, 2010.
16. FIGUEIRO, S. D. ; MALLMANN, E. J. J. ; GOES, J. C. ; RICARDO, N. M. P. S. ; DENARDIN, J.C. ; SOMBRA, A. S. B. ; FECHINE, P. B. A. . New ferrimagnetic biocomposite film based in collagen and yttrium iron garnet. Express Polymer Letters, v. 4, p. 790-797, 2010.
17. BARRETO, A. C. H. ; COSTA, M. M. ; SOMBRA, A. S. B. ; ROSA, D. S. ; NASCIMENTO, R. F. ; MAZZETTO, S. E. ; FECHINE, P. B. A. . Chemically Modified Banana Fiber: Structure, Dielectrical Properties and Biodegradability. Journal of Polymers and the Environment, v. 18, p. 523-531, 2010.
18. MENEZES, J. W. M. ; SOUSA, J. R. R. ; FRAGA, W. B. ; LOPES, V. C. M. ; LIMA, F. T. ; Sobrinho, C. S. ; SOMBRA, A. S. B. . Spatiotemporal optical solitons in planar waveguide with periodically modulated cubic-quintic nonlinearity. Optical and Quantum Electronics, v. 42, p. 179-192, 2010.
2009
1. FECHINE, P. B. A. ; SILVA, E. N. ; MENEZES, A S ; DEROV, J. ; STEWART, J. W. ; DREHMAN, A. J. ; VASCONCELOS, I. F. ; AYALA, A. P. ; CARDOSO, L. P. ; SOMBRA, A. S. B. . Synthesis, Structure and Vibracional Properties of GdIGX:YIG1-X Ferrimagnetic Ceramic Matrix Composite. Journal of Physics and Chemistry of Solids, v. 70, p. 202-209, 2009.
2. FREIRE, F. N. A. ; SANTOS, M. R. P. ; PEREIRA, F. M. M. ; SOHN, R. S. T. M. ; ALMEIDA, J. S. ; MEDEIROS, A. M. L. ; SANCHO, E. O. ; COSTA, M. M. ; SOMBRA, A. S. B. . Studies of the Temperature Coefficient of Capacitance (TCC) of a New Electroceramic Composite: Pb(Fe0.5Nb0.5)O3 (PFN)-Cr0.75Fe1.25O3(CRFO). Journal of Materials Science: Materials in Electronics, v. 20, p. 149-156, 2009.
3. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; GRAÇA, M. P. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . Structural and Electrical Study of CaCu3Ti4O12 (CCTO) Obtained in a New Ceramic Procedure. Journal of Materials Science: Materials in Electronics, v. 20, p. 163-170, 2009.
4. COSTA, R. C. S. ; COSTA, A. D. S. B. ; FREIRE, F. N. A. ; SANTOS, M. R. P. ; ALMEIDA, J. S. ; SOHN, R. S. T. M. ; SASAKI, J. M. ; SOMBRA, A. S. B. . Structural properties of CaTi1-x(Nb2/3Li2/3)xO3-y (CNLTO) and CaTi1-x(Nb1/2Ln1/2)xO3 (Ln=Fe (CNFTO), Bi (CNBTO)), modified dielectric ceramics for microwave applications. Physica B: Condensed Matter, v. 404, p. 1409-1414, 2009.
5. SILVA, C. C. ; GRAÇA, M. P. F. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Structural and Electrical Study of Calcium Phosphate Obtained by a Microwave Radiation Assisted Procedure. Physica B: Condensed Matter, v. 404, p. 1503-1508, 2009.
6. SILVA, G. L. ; GLERIA, I. ; LYRA, M. L. ; SOMBRA, A. S. B. . Modulational Instability in Lossless Fibers with Saturable Delayed Nonlinear Response. Journal of the Optical Society of America B, v. 26, p. 183-188, 2009.
7. FECHINE, P. B. A. ; ALMEIDA, A. F. L. ; OLIVEIRA, R. S. ; SILVA, R. R. ; SOMBRA, A. S. B. . Bulk and Patch Ferrite Resonator Antennas Based in the Ceramic Matrix Composite: GdIGXYIG1-X. Microwave and Optical Technology Letters, v. 51, p. 1595-1602, 2009.
8. SILVA, C C ; GRAÇA, M P F ; VALENTE, M A ; SOMBRA, A. S. B. . Structural study of Fe O -doped calcium phosphates obtained by the mechanical milling method. Physica Scripta, v. 79, p. 055601-044606, 2009.
9. PEREIRA, F. M. M. ; SANTOS, M. R. P. ; SOHN, R. S. T. M. ; ALMEIDA, J. S. ; MEDEIROS, A. M. L. ; COSTA, M. M. ; SOMBRA, A. S. B. . Magnetic and dielectric properties of the M-type barium strontium hexaferrite (Ba x Sr1− x Fe12O19) in the RF and microwave (MW) frequency range. Journal of Materials Science: Materials in Electronics, v. 20, p. 408-417, 2009.
10. LIMA JUNIOR, A. W. ; SOMBRA, A. S. B. . Switching Cell Embedded in Photonic Crystal. Microsystem Technologies, v. 15, p. 821-825, 2009.
11. FERREIRA, A. C. ; SARAIVA SOBRINHO, C. ; MENEZES, J. W. M. ; FRAGA, W. B. ; ROCHA, H. H. B. ; LIMA JUNIOR, A. W. ; SABOIA, K. D. A. ; GUIMARAES, G. F. ; SILVA FILHO, J. M. ; SOMBRA, A. S. B. . A performance study of an all-optical logic gate based in PAM-ASK. Journal of Modern Optics, v. 56, p. 1004-1013, 2009.
12. FECHINE, P. B. A. ; PEREIRA, F. M. M. ; SANTOS, M. R. P. ; FILHO, F. P. ; MENEZES, A S ; OLIVEIRA, R. S. ; GOES, J. C. ; CARDOSO, L. P. ; SOMBRA, A. S. B. . Microstructure and magneto-dielectric properties of ferrimagnetic composite GdIGX:YIG1−X at radio and microwave frequencies. Journal of Physics and Chemistry of Solids, v. 70, p. 804-810, 2009.
13. ROCHA, H. H. B. ; FREIRE, F. N. A. ; SILVA, R. R. ; PAIVA, J. A. C. ; SASAKI, J. M. ; SANTOS, M. R. P. ; GOES, J. C. ; SOMBRA, A. S. B. . STRUCTURAL PROPERTIES STUDY OF THE MAGNETO-DIELECTRIC COMPOSITE Cr0.75Fe1.25O3 (CRFO)-Fe0.5Cu0.75Ti0.75O3 (FCTO). Journal of Alloys and Compounds, v. 481, p. 438-445, 2009.
14. LIMA JUNIOR, A. W. ; SILVA, M. G. ; FERREIRA, A. C. ; SOMBRA, A. S. B. . All-optical nonlinear switching cell made of photonic crystal. Journal of the Optical Society of America A, v. 26, p. 1661-1667, 2009.
15. FRAGA, W. B. ; MENEZES, J. W. M. ; SOBRINHO, C. S. ; FERREIRA, A. C. ; GUIMARÃES, G. F. ; LIMA JUNIOR, A. W. ; FILHO, A. F. G. F. ; ROCHA, H. H. B. ; SABÓIA, K. D. A. ; LIMA, F. T. ; FILHO, J. M. S. ; SOMBRA, A. S. B. . Numerical analysis of the stability of optical bullets (2 + 1) in a planar waveguide with cubic quintic nonlinearity. Optical and Quantum Electronics, v. 41, p. 121-130, 2009.
16. SILVA, C. C. ; VASCONCELOS, I. F. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Magnetic properties study on Fe-doped calcium phosphate. Physica Scripta, v. 80, p. 055706-055709, 2009.
17. FECHINE, P. B. A. ; ROCHA, H. H. B. ; MORETZSOHN, R. S. T. ; DENARDIN, J. C. ; LAVIN, R. ; SOMBRA, A. S. B. . Study of a microwave ferrite resonator antenna, based on a ferrimagnetic composite (Gd3Fe5O12)GdIGX (Y3Fe5O12)YIG1?X. IET Microwaves, Antennas & Propagation, v. 3, n. 8, p. 1191-1198, 2009.
18. SILVA, C. C. ; SOMBRA, A. S. B. . Structural studies of calcium phosphate doped with titanium and zirconium obtained by high-energy mechanical alloying. Physica Scripta, v. 80, p. 065801-065805, 2009.
19. ROCHA, H. H. B. ; LIMA, J. L. S. ; SARAIVA SOBRINHO, C. ; FERREIRA, A. C. ; SALES, J. C. ; SOMBRA, A. S. B. . Soliton–like pulse dynamics in add–drop optical filters based on nonlinear fiber grating couplers. Optical and Quantum Electronics, v. 41, p. 441-452, 2009.
20. LIMA JUNIOR, A. W. ; SOMBRA, A. S. B. . Switching Cell of Directional Coupler Embedded in Photonic Crystal Driven by an External Command (for the C, L, and U bands of ITU). Journal of communication and information systems, v. 24, p. 40-45, 2009.
2008
1. FREIRE, F. N. A. ; ROCHA, H. H. B. ; SANTOS, M. R. P. ; FECHINE, P. B. A. ; PEREIRA, F. M. M. ; SOHN, R. S. T. M. ; VASCONCELOS, I. F. ; SOMBRA, A. S. B. . Structural Studies of a New Electroceramic Composite: Pb(Fe0.5Nb0.5)O3 (PFN)-Cr0.75Fe1.25O3(CRFO). Journal of Materials Science, v. 43, n. 1, p. 75-82, 2008.
2. ALMEIDA, A. F. L. ; SILVA, R. R. ; ROCHA, H. H. B. ; FECHINE, P. B. A. ; CAVALCANTE, F. S. A. ; VALENTE, M. A. ; FREIRE, F. N. A. ; SOHN, R. S. T. M. ; SOMBRA, A. S. B. . Experimental and Numerical Investigation of a Ceramic Dielectric Resonator (DRA): CaCu3Ti4O12 (CCTO). Physica B: Condensed Matter, v. 403, p. 586-594, 2008.
3. SARAIVA SOBRINHO, C. ; FERREIRA, A. C. ; MENEZES, J. W. M. ; GUIMARÃES, G. F. ; FRAGA, W. B. ; FURTADO FILHO, A. F. G. ; ROCHA, H. H. B. ; MARCIANO, S. P. ; SABOIA, K. D. A. ; SOMBRA, A. S. B. . Analysis of an Optical Logic Gate Using a Symmetric Coupler Operating With Pulse Position Modulation (PPM). Optics Communications, v. 281, p. 1056-1064, 2008.
4. LIMA, J. L. S. ; SABOIA, K. D. A. ; SALES, J. C. ; MENEZES, J. W. M. ; FRAGA, W. B. ; GUIMARÃES, G. F. ; SOMBRA, A. S. B. . Optical Short Pulse Switching Characteristics of Ring Resonators. Optical Fiber Technology, v. 14, p. 79-83, 2008.
5. SILVA, C. C. ; FILHO, F. P. ; SOMBRA, A. S. B. ; ROSA, I. L. V. ; LEITE, E. R. ; LONGO, E. ; VARELA, J. A. . Study of Structural and Photoluminescent Properties of Ca8Eu2(PO4)6O2. Journal of Fluorescence, v. 18, p. 253-259, 2008.
6. PEREIRA, F. M. M. ; RODRIGUES JUNIOR, C. A. ; SANTOS, M. R. P. ; SOHN, R. S. T. M. ; FREIRE, F. N. A. ; SASAKI, J. M. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . Structural and Dielectric Spectroscopy Studies of the M-Type Barium Strontium Hexaferrite Alloys (BaxSr1-xFe12O19). Journal of Materials Science: Materials in Electronics, v. 19, n. 7, p. 627-638, 2008.
7. GRAÇA, M. P. F. ; SILVA, M. G. F. ; SOMBRA, A. S. B. ; VALENTE, M. A. . The dielectric behaviour of a thermoelectric treated B2O3-Li2O-Nb2O5 glass. Journal of Non-Crystalline Solids, v. 354, p. 3408-3413, 2008.
8. ROCHA, H. H. B. ; FREIRE, F. N. A. ; SANTOS, M. R. P. ; SASAKI, J. M. ; CORDARO, T ; SOMBRA, A. S. B. . Radio-Frequency (RF) Studies of the Magneto-Dielectric Composites: Cr0.75Fe1.25O3 (CRFO)-Fe0.5Cu0.75Ti0.75O3 (FCTO). Physica B: Condensed Matter, v. 403, p. 2902-2909, 2008.
9. FECHINE, P. B. A. ; ROCHA, M. J. S. ; SANTOS, M. R. P. ; PEREIRA, F. M. M. ; MENEZES, A S ; ABREU, J. A. M. ; GOES, J. C. ; AYALA, A. P. ; SOMBRA, A. S. B. . Microstructural and Electrical Properties of PbTIO3 Screen-Printed Thick Films. Journal of Materials Science: Materials in Electronics, v. 19, n. 10, p. 973-980, 2008.
10. FREIRE, F. N. A. ; ROCHA, H. H. B. ; SOHN, R. S. T. M. ; SILVA, M. G. ; SANTOS, M. R. P. ; JUNQUEIRA, C. C. M. ; CORDARO, T ; SOMBRA, A. S. B. . Bandwidth Enhancement of Stacked Dielectric Resonator Antennas Excited by a Coaxial Probe: an experimental and numerical investigation. IET Microwaves, Antennas and Propagation, v. 2, n. 6, p. 580-587, 2008.
11. FECHINE, P. B. A. ; SOMBRA, A. S. B. ; FREITAS JR, J. A. . Dielectric studies of Metal/n-GaN/Metal Schottky contacts in the radio frequency range. Journal of Crystal Growth, v. 310, n. 17, p. 3992-3997, 2008.
12. FECHINE, P. B. A. ; SOHN, R. S. T. M. ; COSTA, R. C. S. ; DEROV, J. ; STEWART, J. W. ; DREHMAN, A. J. ; JUNQUEIRA, C. C. M. ; SOMBRA, A. S. B. . Magneto-dielectric properties of the Y3Fe5O12 and Gd3Fe5O12 dielectric ferrite resonator antennas.Microwave and Optical Technology Letters, v. 50, n. 11, p. 2852-2857, 2008.
13. FILHO, F. P. ; NOGUEIRA, R. E. F. Q. ; GRAÇA, M. P. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. ; SILVA, C. C. . Structural and Mechanical Study of the Sintering Effect in Hydroxyapatite Doped with Iron Oxide. Physica B: Condensed Matter, v. 403, p. 3826-3929, 2008.
14. FURTADO FILHO, A. F. G. ; SOUSA, J. R. R. ; LIMA, F. T. ; FRAGA, W. B. ; GUIMARAES, G. F. ; MENEZES, J. W. M. ; SOMBRA, A. S. B. . A Performance Study of a Nonlinear All Fiber Michelson Interferometer, Add-Drop Multiplexer, Based in Fyber Bragg Grating Mirrors. Optical and Quantum Electronics, v. 40, p. 525-534, 2008.
15. SILVA FILHO, J. M. ; MENEZES, J. W. M. ; GUIMARÃES, G. F. ; FERREIRA, A. C. ; FRAGA, W. B. ; FURTADO FILHO, A. F. G. ; SOMBRA, A. S. B. . Raman Amplification and Optical Short Pulse Generation in a Waveguide With Periodic Gain. Optics Communications, v. 281, p. 5804-5810, 2008.
16. SILVA, C. C. ; FILHO, F. P. ; GRAÇA, M. P. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . Dielectrical and structural characterization of iron oxide added to hydroxyapatite. Bulletin of Materials Science, v. 31, p. 635-638, 2008.
17. SANTOS, M. R. P. ; FREIRE, F. N. A. ; SOHN, R. S. T. M. ; ALMEIDA, J. S. ; SANCHO, E. O. ; COSTA, A. D. S. B. ; MEDEIROS, A. M. L. ; SOMBRA, A. S. B. . Electrical Properties of the Electroceramic Composite in the Microwave Frequency Range: Pb(Fe0.5Nb0.5)O3(PFN) -Cr0.75Fe1.25O3 (CRFO). Physica Scripta, v. 78, p. 65704-65709, 2008.
2007
1. PINHEIRO, A. G. ; PEREIRA, F. M. M. ; SANTOS, M. R. P. ; ROCHA, H. H. B. ; SOMBRA, A. S. B. . Electric Properties of Bi4Ti3O12(BIT)-CaCu3Ti4O12 (CCTO) Composite Substrates for High Dielectric Constant Devices. Journal of Materials Science, v. 42, n. 6, p. 2112-2120, 2007.
2. SARAIVA SOBRINHO, C. ; RIOS, C. S. N ; MARCIANO, S. P. ; GUIMARÃES, G. F. ; SALES, J. C. ; SABOIA, K. D. A. ; ROCHA, H. H. B. ; SOMBRA, A. S. B. . A Performance Study of a Logical Gate Using PPM Optical Pulse Modulation for TDM Systems. Optics Communications, v. 275, p. 476-485, 2007.
3. GRAÇA, M. P. F. ; SILVA, M. G. F. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Electric and Dielectric Properties of A SiO2-Na2O-Nb2O5 Glass Subject to a Controlled Heat-Treatment Process. Physica B: Condensed Matter, v. 396, p. 62-69, 2007.
4. SILVA, C. C. ; GRAÇA, M. P. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . Crystallite Size Study of Nanocrystalline Hydroxyapatite and Ceramic System With Titanium Oxide Obtained by Dry Ball Milling. Journal of Materials Science, v. 42, n. 11, p. 3851-3855, 2007.
5. MENESES, J. W. M. ; FRAGA, W. B. ; GUIMARÃES, G. F. ; FERREIRA, A. C. ; ROCHA, H. H. B. ; SILVA, M. G. ; SOMBRA, A. S. B. . Optical Switches and All-Fiber Logical Devices Based on Triangular and Planar Three-Core Nonlinear Optical Fiber Couplers.Optics Communications, v. 276, p. 107-115, 2007.
6. JIMENEZ, R. ; CALZADA, M. L. ; BRETOS, I. ; GOES, J. C. ; SOMBRA, A. S. B. . Dielectric properties of sol-gel derived CaCu3Ti4O12 (CCTO) thin films onto Pt/TiO2/Si(100) substrates. Journal of the European Ceramic Society, v. 27, p. 3829-3833, 2007.
7. GOES, J. C. ; FIGUEIRO, S. D. ; OLIVEIRA, A. M. ; MACEDO, A. A. M. ; SILVA, C. C. ; RICARDO, N. M. P. S. ; SOMBRA, A. S. B. . Apatite coating on anionic and native collagen films by alternate soaking process. Acta Biomaterialia, v. 3, p. 773-778, 2007.
8. PINHEIRO, A. G. ; PEREIRA, F. F. M. ; SANTOS, M. R. P. ; FREIRE, F. N. A. ; GOES, J. C. ; SOMBRA, A. S. B. . Chitosan-Hydroxyapatite (Ca10(PO4)6(OH)2) -BIT(Bi4Ti3O12) composite films: Preparation and characterization. Polymer Composites, v. 28, p. 582-587, 2007.
9. ALMEIDA, J. S. ; MENESES, J. W. M. ; FRAGA, W. B. ; SALES, J. C. ; FERREIRA, A. C. ; MARCIANO, S. P. ; FURTADO FILHO, A. F. G. ; SILVA, M. G. ; SOMBRA, A. S. B. . Logic Gates Based in Asymmetric Couplers: Numerical Analysis. Fiber and Integrated Optics, v. 26, p. 217-228, 2007.
10. GRAÇA, M. P. F. ; SILVA, M. G. F. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Electrical characterization of SiO2:LiNbO3 glass and glass-ceramics using dc conductivity, TSDC measurements and dielectric spectroscopy. Journal of Non-Crystalline Solids, v. 353, p. 4390-4394, 2007.
11. SABOIA, K. D. A. ; FECHINE, P. B. A. ; SANTOS, M. R. P. ; FREIRE, F. N. A. ; PEREIRA, F. M. M. ; SOMBRA, A. S. B. . Composite Screen-Printed Thick Films for High Dielectric Constant Devices: Bi4Ti3O12(BIT)- CaCu3Ti4O12(CCTO) Films. Polymer Composites, v. 28, p. 771-777, 2007.
12. ORJUBIN, G. ; RICHALOT E. ; PICON O. ; LEGRAND O. . Chaoticity of a Reverberation Chamber Assessed From the Analysis of Modal Distributions Obtained by FEM. IEEE Transactions on Electromagnetic Compatibility, v. 49, n. 4, p. 762-771, 2007.
13. ROCHA, H. H. B. ; FREIRE, F. N. A. ; COSTA, R. C. S. ; SOHN, R. S. T. M. ; ORJUBIN, G. ; JUNQUEIRA, C. C. M. ; CORDARO, T. ; SOMBRA, A. S. B. . Dielectric resonator antenna: operation of the magneto-dielectric composites Cr0.75Fe1.25O3 (CRFO)/Fe0.5Cu0.75Ti0.75O3 (FCTO). Microwave and Optical Technology Letters, v. 49, n. 2, p. 409-413, 2006.
14. MENEZES, J. W. M. ; FRAGA, W. B. ; FERREIRA, A. C. ; SABOIA, K. D. A. ; FURTADO FILHO, A. F. G. ; GUIMARÃES, G. F. ; SOUSA, J. R. R. ; ROCHA, H. H. B. ; SOMBRA, A. S. B. . Logic Gates Based in Two and Three-Modes Nonlinear Optical Fiber Couplers. Optical and Quantum Electronics, v. 39, p. 1191-1206, 2007.
2006
1. Fechine, P. B. A. ; Almeida, A. F. L. ; Freire, F. N. A. ; Santos, M. R. P. ; Saboia, K. D. A. ; Jimenez, R. ; Mendiola, J. ; Sombra, A. S. B. . Dielectric Relaxation of BaTiO3 (BTO)-CaCu3Ti4O12 (CCTO) Composite Screen-Printed Thick Films at Low Temperatures.Materials Chemistry and Physics, v. 96, n. 2-3, p. 402-408, 2006.
2. Silva, M. G. ; Bastos, A. M. ; Sobrinho, C. S. ; Almeida, E. F. ; Sombra, A. S. B. . Analytical and Numerical Studies of the Performance of a Periodically Modulated Nonlinear Dispersion Directional Fiber Coupler. Optical Fiber Technology, v. 12, n. 2, p. 148-161, 2006.
3. Figueiro, S. D. ; Macedo, A. A. M. ; Melo, M. R. S. ; Freitas, A. L. P. ; Moreira, R. A. ; Souza, B W S ; Oliveira, R. S. ; Goes, J. C. ; Sombra, A. S. B. . On the Dielectric Behaviour of Collagen – Algal Sulfated Polysaccharide Blends: Effect of Glutaraldehyde Crosslinking. Biophysical Chemistry, v. 120, n. 2, p. 154-159, 2006.
4. Fraga, W. B. ; Menezes, J. W. M. ; Silva, M. G. ; Sobrinho, C. S. ; Sombra, A. S. B. . All Optical Logic Gates Based in an Asymmetric Nonlinear Directional Coupler. Optics Communications, v. 262, n. 2, p. 32-37, 2006.
5. Sobrinho, C. S. ; Furtado Filho, A. F. G. ; Sales, J. C. ; Morais Neto, A. F. ; Almeida, E. F. ; Sombra, A. S. B. . Acousto-Optic Tunable Filter (Aotf) Revisited : Ultrashort Optical Pulses Crosstalk Studies on the Lossy Filter. Fiber and Integrated Optics, v. 25, n. 3, p. 195-211, 2006.
6. Silva, C. C. ; Graça, M. P. F. ; Valente, M. A. ; Sombra, A. S. B. . AC and DC Conductivity Analysis of Hydroxyapatite and Calcium Phosphate with Titanium Formed by Dry Ball Milling. Journal of Non-Crystalline Solids, v. 352, n. 9-20, p. 1490-1494, 2006.
7. Graça, M. P. F. ; Silva, M. G. F. ; Sombra, A. S. B. ; Valente, M. A. . Study of the Electric and Dielectric Properties of SiO2-Li2O-Nb2O5 Sol-Gel Glass-Ceramics. Journal of Non-Crystalline Solids, v. 352, n. 9-20, p. 1501-1505, 2006.
8. Silva, C. C. ; Graça, M P ; Valente, M. A. ; Goes, J. C. ; Sombra, A. S. B. . Microwave Preparation, Structure and Electrical Properties of Calcium-Sodium-Phosphate Biosystem. Journal of Non-Crystalline Solids, v. 352, n. 32-35, p. 3512-3517, 2006.
9. Lima, C. G. A. ; Oliveira, R. S. ; Figuero, S. D. ; Wehmann, C. F. ; Goes, J. C. ; Sombra, A. S. B. . DC Conductivity and Dielectric Permittivity of Collagen-Chitosan Films. Materials Chemistry and Physics, v. 99, n. 2-3, p. 284-288, 2006.
10. Fechine, P. B. A. ; Távora, A. ; Kretly, L. C. ; Almeida, A. F. L. ; Santos, M. R. P. ; Freire, F. N. A. ; Sombra, A. S. B. . Microstrip Antenna on a High Dielectric Constant Substrate: BaTiO3 (BTO)-CaCu3Ti4O12(CCTO) Composite Screen-Printed Thick Films.Journal of Electronic Materials, v. 35, n. 10, p. 1848-1856, 2006.
11. Graça, M. P. F. ; Silva, M. G. F. ; A. S. B. Sombra; Valente, M. A. . Electrical and Dielectrical Properties of SiO2-Li2O-Nb2O5 Glass and Glass-Ceramics Obtained by Thermoelectric Treatments. Journal of Non-Crystalline Solids, v. 352, n. 42-49, p. 5199-5204, 2006.
12. Almeida, A. F. L. ; Fechine, P. B. A. ; Kretly, L. C. ; Sombra, A. S. B. . BaTiO3 (BTO) – CaCu3Ti4O12 (CCTO) Substrates for Microwave Devices and Antennas. Journal of Materials Science, v. 41, n. 14, p. 4623-4631, 2006.
13. Saraiva Sobrinho, C. ; Rios, C. S. N ; Sombra, A. S. B. . Integrated acousto-optical temperature sensor. Fiber and Integrated Optics, v. 25, n. 6, p. 387-402, 2006.
14. Silva, C. C. ; Valente, M. A. ; Sombra, A. S. B. . The Modulus Formalism Used in the Dielectric Analysis with Optical Characterization of Hydroxyapatite and CaTi4P6O24 Ceramic Formers by Dry Ball Milling. Materials Science Forum, v. 514, p. 1087-1093, 2006.
2005
1. Silva, M. G. ; Bastos, A. M. ; Saraiva Sobrinho, C. ; Lima, J. L. S. ; Almeida, E. F. ; Sombra, A. S. B. . Optical Crosstalk in a Periodically Inhomogeneous Nonlinear Dispersion Directional Fiber Coupler . Optical Fiber Technology, v. 11, n. 2, p. 180-192, 2005.
2. Lima, J. L. S. ; Rios, C. S. N. ; Silva, M. G. ; Saraiva Sobrinho, C. ; Almeida, E. F. ; Sombra, A. S. B. . Crosstalk and Contrast Ratio Studies of a Four Stage Mach-Zehnder Optical Fiber Demultiplexer. Optical Fiber Technology, v. 11, n. 2, p. 167-179, 2005.
3. Silva, C. C. ; Rocha, H. H. B. ; Freire, F. N. A. ; Santos, M. R. P. ; Saboia, K. D. A. ; Goes, J. C. ; Sombra, A. S. B. . Hydroxiapatite Screen-Printed Thick Films: Optical and Electrical Properties. Materials Chemistry and Physics, v. 92, n. 1, p. 260-268, 2005.
4. Wehmann, C. F. ; Fernandes, L. M. ; Saraiva Sobrinho, C. ; Silva, M. G. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Analysis of the Four Wave Mixing Effect (FWM) in a Dispersion Decreasing Fiber (DDF) For a Wdm System. Optical Fiber Technology, v. 11, n. 3, p. 306-318, 2005.
5. Silva, C. C. ; Valente, M. A. ; Graça, M. P. F. ; Sombra, A. S. B. . The Modulus Formalism Used in the Dielectric Analysis of Hydroxyapatite and Calcium Phosphate With Titanium Formed by Dry Ball Milling. Journal of Non-Crystalline Solids, v. 351, n. 33-36, p. 2945-2950, 2005.
6. Wehmann, C. F. ; Silva, M. G. ; Fernandes, L. M. ; Lima, J. L. S. ; Almeida, E. F. ; Sombra, A. S. B. . Optical Mixing Effect and Modulation Instability in a Dispersion Decreasing Fibre Operating With Picosecond Light Pulses. IEE Proceedings Optoelectronics, v. 152, n. 6, p. 292-298, 2005.
2004
1. Silva, C. C. ; Almeida, A. F. L. ; Oliveira, R. S. ; Pinheiro, A. G. ; Goes, J. C. ; Sombra, A. S. B. . Dielectric Permittivity and Loss of Hydroxyapatite Scree-Printed Thick Films. Journal of Materials Science, v. 38, n. 18, p. 3713-3720, 2004.
2. Silva, C. C. ; Sombra, A. S. B. . Raman Spectroscopy Measurements of Hydroxyapatite Obtained by Mechanical Alloying. Journal of Physics and Chemistry of Solids, v. 65, n. 5, p. 1031-1033, 2004.
3. Almeida, A. F. L. ; Fechine, P. B. A. ; Sasaki, J. M. ; Ayala, A. P. ; Goes, J. C. ; Pontes, D. L. ; Margulis, W. ; Sombra, A. S. B. . Optical and Electrical Properties of Barium Titanate_Hydroxiapatite Composite Screen_Printed Films . Solid State Sciences, v. 6, n. 3, p. 267-278, 2004.
4. Silva, C. C. ; Pinheiro, A. G. ; Pimenta, M. A. ; Righi, A. ; Sasaki, J. M. ; Goes, J. C. ; Aranha, N. ; Oliveira, L. R. ; Sombra, A. S. B. . Properties and in Vivo Investigation of Nanocrystalline Hydroxyapatite Obtained by Mechanical Alloying. Materials Science and Engineering: C, v. 24, n. 4, p. 549-554, 2004.
5. Figueiro, S. D. ; Goes, J. C. ; Moreira, R. A. ; Sombra, A. S. B. . On the Physico-Chemical and Dielectric Propreties of Glutaraldehyde Crosslinked Galactomannan-Collagen Films. Carbohydrate Polymers, v. 56, n. 3, p. 313-320, 2004.
6. Almeida, A. F. L. ; Fechine, P. B. A. ; Goes, J. C. ; Valente, M. A. ; Miranda, M. A . R. ; Sombra, A. S. B. . Dielectric Properties of BaTiO3(BTO)-CaCu3Ti4O12(CCTO) Composite Screen-Printed Thick Films for High Dielectric Constant Devices in the Medium Frequency (MF) Range. Materials Science and Engineering: B, v. 111, n. 2-3, p. 113-123, 2004.
7. Kretly, L. C. ; Almeida, A. F. L. ; Fechine, P. B. A. ; Oliveira, R. S. ; Sombra, A. S. B. . Dielectric Permittivity and Loss of Cacu3Ti4O12 (Ccto) Substrates For Microwave Devices and Antennas. Journal of Materials Science: Materials in Electronics, v. 15, n. 10, p. 657-663, 2004.
8. Saraiva Sobrinho, C. ; Oliveira, M. V. N. ; Lima, J. L. S. ; Silva, M. G. ; Almeida, E. F. ; Sombra, A. S. B. . Numerical Analysis of the Crosstalk on an Integrated Acousto-Optic Tunable Filter (AOTF) For Network Applications. Fiber and Integrated Optics, v. 23, n. 5, p. 345-363, 2004.
9. Valim, D. ; Souza Filho, A. G. ; Freire, P. T. C. ; Fagan, S. B. ; Ayala, A. P. ; Mendes Filho, J. ; Almeida, A. F. L. ; Fechine, P. B. A. ; Sombra, A. S. B. ; Olsen, J. S. ; Gerward, L. . Raman Scattering and X-Ray Diffraction Studies of Polycrystalline CaCu3Ti4O12 Under High-Pressure. Physical Review B, v. 70, n. 13, 132103, p. 1031-1034, 2004.
10. Silva, C. C. ; Valente, M. A. ; Graça, M. P. F. ; Sombra, A. S. B. . Preparation and Optical Characterization of Hydroxyapatite and Ceramic Systems With Titanium and Zirconium Formed by Dry High Energy Mechanical Alloying . Solid State Sciences, v. 6, n. 12, p. 1365-1374, 2004.
2003
1. Cruz, A. G. B. ; Goes, J. C. ; Figueiro, S. D. ; Feitosa, J. P. A. ; Ricardo, N. M. P. S. ; Sombra, A. S. B. . On the Piezoelectricity of Collagen/Natural Rubber Blend Films. European Polymer Journal, v. 39, p. 1267-1272, 2003.
2. Silva, C. C. ; Pinheiro, A. G. ; Miranda, M. A . R. ; Goes, J. C. ; Sombra, A. S. B. . Structural Properties of Hydroxyapatite Obtained by Mechanosynthesis. Solid State Sciences, v. 5, p. 553-558, 2003.
3. Harssoyono, H. ; Siregar, R. ; Tjia, M. ; Sombra, A. S. B. . Nonlinear Optical Waveguide Coupling With Planar Solitonic Field Profile. Optics Communications, v. 221, p. 63-71, 2003.
4. Sombra, A. S. B. ; Kretly, L. C. ; Almeida, A. F. L. ; Oliveira, R. S. ; Sasaki, J. M. . Electrical and Optical Properties of Cacu3Ti4O12 (Ccto)Substrates For Microwave Devices and Antennas. Microwave and Optical Technology Letters, v. 39, n. 2, p. 145-150, 2003.
2002
1. Goes, J. C. ; Figueiro, S. D. ; Paiva, J. A. C. ; Vasconcelos, I. F. ; Sombra, A. S. B. . On the Piezoelectricity of Anionic Collagen Films. Journal of Physics and Chemistry of Solids, v. 63, n. 3, p. 465-470, 2002.
2. Sousa Neto, V. O. ; Silva, C. C. ; Almeida, A. F. L. ; Figueiro, S. D. ; Goes, J. C. ; Paiva, J. A. C. ; Magalhães, C. ; Sombra, A. S. B. . Study of the Electrical Conductivity and Piezoelectricity in Iron Doped Collagen Films. Solid State Sciences, v. 4, n. 1, p. 43-51, 2002.
3. Sousa Neto, V. O. ; Silva, C. C. ; Figueiro, S. D. ; Goes, J. C. ; Paiva, J. A. C. ; Magalhães, C. ; Wehmann, C. F. ; Sombra, A. S. B. . Study of the Piezoelectricity in Iron Doped Collagen Films. Journal of Materials Science: Materials in Electronics, v. 13, n. 3, p. 157-165, 2002.
4. Silva, C. C. ; Pinheiro, A. G. ; Figueiro, S. D. ; Goes, J. C. ; Sasaki, J. M. ; Miranda, M. A . R. ; Sombra, A. S. B. . Piezoelectric Properties of Collagen- Nanocrystalline Hydroxyapatite Composites . Journal of Materials Science, v. 37, n. 10, p. 2061-2070, 2002.
5. Silva, C. C. ; Thomazini, D. ; Pinheiro, A. G. ; Lanciotti Jr, F. ; Sasaki, J. M. ; Goes, J. C. ; Sombra, A. S. B. . Optical Properties of Hydroxyapatite Obtained by Mechanical Alloying. Journal of Physics and Chemistry of Solids, v. 63, p. 1745-1757, 2002.
6. Melo, A. M. ; Lima, J. L. S. ; Oliveira, R. S. ; Sombra, A. S. B. . Photonic Time-Division Multiplexing (Otdm) Using Ultrashort Picosecond Pulses in a Terahertz Optical Asymmetric Demultiplexer (Toad). Optics Communications, v. 205, n. 4-6, p. 299-312, 2002.
7. Saraiva Sobrinho, C. ; Lima, J. L. S. ; Almeida, E. F. ; Sombra, A. S. B. . Acusto-Optic Tunable Filter (Aotf) With Increasing Nonlinearity and Loss. Optics Communications, v. 208, n. 4-6, p. 415-426, 2002.
8. Costa, L. C. ; Valente, M. A. ; Mendiretta, S. K. ; Henry, F. ; Sombra, A. S. B. . Electrical and Dielectrical Properties of the Percolating System Polystyrene/Polypyrol Particles. European Polymer Journal, v. 38, n. 8, p. 1495-1499, 2002.
9. Carrasco, M. F. ; Mendiretta, S. K. ; Marques, L. ; Sombra, A. S. B. . Properties of Nanoparticles of Bi12Geo20 Obtained by Ball Milling. Journal of Materials Science Letters, v. 21, n. 12, p. 963-965, 2002.
10. Almeida, A. F. L. ; Vasconcelos, I. F. ; Valente, M. A. ; Sombra, A. S. B. . The Optical and 57Fe Mossbauer Spectra of Lithium Diborate (Li2B4O7) in Borophosphate Glass-Ceramics. Physica B: Condensed Matter, v. 322, n. 3-4, p. 276-288, 2002.
11. Sombra, A. S. B. ; Saraiva Sobrinho, C. . Picosecond Pulse Switching in An Acousto-Optic Tunable Filter (Aotf) With Loss.Nonlinear Optics, v. 29, n. 1, p. 79-97, 2002.
12. Saraiva Sobrinho, C. ; Lima, J. L. S. ; Sombra, A. S. B. . Interchannel Crosstalk on the Acousto-Optic Tunable Filter (Aotf) For Network Applications. Microwave and Optical Technology Letters, v. 35, n. 3, p. 230-235, 2002.
13. Almeida, A. F. L. ; Oliveira, R. S. ; Goes, J. C. ; Sasaki, J. M. ; Mendes Filho, J. ; Sombra, A. S. B. . Structural Properties of Cacu3Ti4O12(Ccto) Obtained by Mechanical Alloying. Materials Science and Engineering: B, v. B96, p. 275-283, 2002.
2001
1. Medeiros Neto, J. A. ; Aranha, N. ; Sombra, A. S. B. . An Ultra Stable Glass System For Optical Fiber Devices. Physical Chemistry Chemical Physics, v. 3, p. 613-615, 2001.
2. Vasconcelos, I. F. ; Pimenta, M. A. ; Sombra, A. S. B. . Optical Properties of Bismuth Silicon Oxide (Bso) and Bismuth Titanium Oxide (Bto) Obtained by Mechanical Alloying. Journal of Materials Science, v. 36, n. 3, p. 587-592, 2001.
3. Silva, M. G. ; Oliveira, R. S. ; Sombra, A. S. B. . Ultrashort Pulse Propagation in a Lossy Acusto-Optic Tunable Filter(Aotf).Microwave and Optical Technology Letters, v. 28, n. 5, p. 346-350, 2001.
4. Nobrega, K. Z. ; Silva, M. G. ; Sombra, A. S. B. . Analytical and Numerical Studies on Increasing Nonlinearity Fiber Couplers.Nonlinear Optics, v. 26, p. 337-351, 2001.
5. Silva, C. C. ; Pinheiro, A. G. ; Thomazini, D. ; Goes, J. C. ; Figueiro, S. D. ; Paiva, J. A. C. ; Sombra, A. S. B. . Effect of the Ph on the Piezoelectric Properties of Collagen Films. Materials Science and Engineering: B, v. 83, p. 165-172, 2001.
6. Vasconcelos, L. W. ; Margarit, I. C. P. ; Mattos, O. R. ; Fragata, F. L. ; Sombra, A. S. B. . Inhibitory Properties of Calcium Exchanged Silica Epoxy Paintings. Corrosion Science, v. 43, p. 2291-2303, 2001.
7. Silva, C. C. ; Thomazini, D. ; Pinheiro, A. G. ; Aranha, N. ; Goes, J. C. ; Figueiro, S. D. ; Sombra, A. S. B. . Collagen-Hydroxiapatite Films:Piezoelectric Properties. Materials Science and Engineering: B, v. 86, p. 210-218, 2001.
8. Silva, C. C. ; Lima, C. G. A. ; Pinheiro, A. G. ; Goes, J. C. ; Figueiro, S. D. ; Sombra, A. S. B. . On the Piezoelectricity of Collagen-Chitosan Films. Physical Chemistry Chemical Physics, v. 3, p. 4154-4157, 2001.
9. Silva, M. G. ; Saraiva Sobrinho, C. ; Oliveira, R. S. ; Sombra, A. S. B. . Analysis of Ultrashort Pulse Switching in An Acusto-Optic Tunable Filter(Aotf) With Loss. Journal of Optical Communications, v. 22, n. 6, p. 228-235, 2001.
10. Almeida, A. F. L. ; Thomazini, D. ; Vasconcelos, I. F. ; Valente, M. A. ; Sombra, A. S. B. . Structural Studies of Lithium Triborate(Lbo-Lib3O5)In Borophosphate Glass-Ceramics. International Journal of Inorganic Materials, v. 3, n. 7, p. 829-838, 2001.
11. Thomazini, D. ; Lanciotti Jr, F. ; Sombra, A. S. B. . Structural Properties of Lithium Borate Glasses Doped With Rare Earth Ions.Cerâmica, Associação Brasileira de Cerâmica, v. 47, n. 302, p. 88-93, 2001.
2000
1. Nobrega, K. Z. ; Silva, M. G. ; Sombra, A. S. B. . Multistable All Optical Switching Behavior on the Asymmetric Nonlinear Coupler.Optics Communications, v. 173, p. 413-421, 2000.
2. Almeida, E. F. ; Paiva, J. A. C. ; Sombra, A. S. B. . Infrared and Complex Dielectric Function Studies of Linbo3 in Niobate Glass Ceramics. Journal of Materials Science, v. 35, n. 6, p. 1555-1559, 2000.
3. Andrade, J. S. ; Pinheiro, A. G. ; Vasconcelos, I. F. ; Araujo, M. A. B. ; Valente, M. A. ; Sombra, A. S. B. . Structural Studies of Knbo3 in Niobate Glass-Ceramics. Journal of Physics and Chemistry of Solids, v. 61, n. 6, p. 899-906, 2000.
4. Felix, S. F. ; Gouveia, E. A. ; Araujo, M. T. ; Sombra, A. S. B. ; Gouveia Neto, A. S. . Up Conversion Pumped Light Amplification Withtemperature Tunable Gain in Er(3+)/Yb(3+) Codoped Chalcogenide Glass. Journal of Luminescence, v. 87-89, p. 1020-1022, 2000.
5. Melo, A. M. ; Lima, J. L. S. ; Sombra, A. S. B. . Optical Time Division Multiplexing (Otdm) Using Picosecond Solitons in a Terahertz Optical Asymmetric Demultiplexer(TOAD). Optics Communications, v. 186, p. 87-97, 2000.
1999
1. Almeida, E. F. ; Paiva, J. A. C. ; Sombra, A. S. B. . Dielectric Complex Function Studies of Linbo3 in Niobate Glass Ceramics.Physica Status Solidi A, v. 172, p. 255-263, 1999.
2. Santos, P. V. ; Araujo, M. T. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Optical Thermometry Through Infrared Excited Upconversion Fluorescence Emission in Er3+ and Er3+/Yb3+ Codoped Chalcogenide Glasses. IEEE Journal of Quantum Electronics, v. 35, n. 2, p. 395-399, 1999.
3. Santos, P. V. ; Gouveia, E. A. ; Araujo, M. T. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Thermally Induced Threefold Upconversion Emission Enhancement in Nonresonant Excited Er3/Yb3 Codoped Chalcogenide Glass. Applied Physics Letters, v. 74, n. 24, p. 3607-3609, 1999.
4. Lima, J. L. S. ; Sombra, A. S. B. . Soliton and Quasi Soliton Switching in Nonlinear Optical Loop Mirror(Nolm) Constructed From Dispersion Decreasing Fiber(DDF). Optics Communications, v. 163, n. 4-6, p. 292-300, 1999.
5. Lima, J. L. S. ; Sombra, A. S. B. . Ultrafast Optical Switching in a Nonlinear Loop Mirror Constructed From Dispersion Decreasing Fiber. Journal of Optical Communications, v. 20, n. 3, p. 82-87, 1999.
6. Goes, J. C. ; Figueiro, S. D. ; Paiva, J. A. C. ; Vasconcelos, I. F. ; Sombra, A. S. B. . Piezoelectricity of Native and Anionic Collagen. Journal of Materials Science Letters, v. 18, n. 12, p. 983-986, 1999.
7. Andrade, J. S. ; Pinheiro, A. G. ; Vasconcelos, I. F. ; Sasaki, J. M. ; Paiva, J. A. C. ; Valente, M. A. ; Sombra, A. S. B. . Raman and Infrared Spectra of Knbo3 in Niobate Glass Ceramics. Journal of Physics: Condensed Matter, v. 11, n. 22, p. 4451-4460, 1999.
8. Vasconcelos, I. F. ; Figueiredo, R. S. ; Lima, S. G. ; Sombra, A. S. B. . Bismuth Silicon Oxide(Bso) and Bismuth Titanium Oxide(Bto) Obtained by Nechanical Alloying. Journal of Materials Science Letters, v. 18, n. 22, p. 1871-1874, 1999.
9. Nobrega, K. Z. ; Silva, M. G. ; Sombra, A. S. B. . Optical Multistability on the Asymmetric Nonlinear Directional Coupler. Journal of Optical Communications, v. 20, n. 6, p. 210-214, 1999.
10. Silva, M. G. ; Nobrega, K. Z. ; Sombra, A. S. B. . Analysis of Soliton Switching in Dispersion Decreasing Fiber Couplers. Optics Communications, v. 171, p. 351-364, 1999.
11. Goes, J. C. ; Figueiro, S. D. ; Paiva, J. A. C. ; Sombra, A. S. B. . Piezoelectric and Dielectric Properties of Collagen Films. Physica Status Solidi A, v. 176, p. 1077-1083, 1999.
12. Araujo, E. B. ; Eiras, J. A. ; Almeida, E. F. ; Paiva, J. A. C. ; Sombra, A. S. B. . Structure and Nucleation of the Iron Lithium Niobium Phosphate Glasses Studied by Infrared Spectroscopy and DTA. Physics and Chemistry of Glasses, v. 40, n. 5, p. 273-276, 1999.
13. Silva, J. I. ; Holz, R. ; Sombra, A. S. B. . Soliton Transmission Under Pulse Position Modulation (PPM) in Optical Fibres. Canadian Journal of Physics, v. 77, n. 4, p. 481-490, 1999.
1998
1. Oliveira, A. S. ; Araujo, M. T. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. ; Messaddeq, Y. . Frequency Upconversion in Er3+/Yb3+ Codoped Chalcogenide Glass. Applied Physics Letters, v. 72, p. 753-755, 1998.
2. Oliveira, A. S. ; Araujo, M. T. ; Gouveia Neto, A. S. ; Sombra, A. S. B. ; Medeiros Neto, J. A. ; Aranha, N. . Upconversion Fluorescence Spectroscopy of Er3+/Yb3+ Doped Heavy Metal Bi203-Na20-Nb205-Ge02 Glass. Journal of Applied Physics, v. 83, p. 604-606, 1998.
3. Araujo, E. B. ; Eiras, J. A. ; Almeida, E. F. ; Paiva, J. A. C. ; Sombra, A. S. B. . Determination of the Nucleation Rate of 50Li20-50P2O5 Glass by Differential Thermal Analysis. Journal of Materials Science Letters, v. 17, n. 6, p. 497-499, 1998.
4. Figueiredo, R. S. ; Messai, A. ; Hernandes, A. C. ; Sombra, A. S. B. . Piezoelectric Lithium Niobate Obtained by Mechanical Alloying. Journal of Materials Science Letters, v. 17, n. 6, p. 449-451, 1998.
5. Silva, M. G. ; Sombra, A. S. B. . All Optical Soliton Switching in Three Core Nonlinear Fiber Couplers. Optics Communications, v. 145, p. 281-290, 1998.
6. Amorim, H. T. ; Araujo, M. T. ; Gouveia, E. A. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Infrared to Visible Upconversion Fluorescence Spectroscopy in Er3 Doped Chalcogenide Glass. Journal of Luminescence, v. 78, p. 271-277, 1998.
7. Araujo, E. B. ; Paiva, J. A. C. ; Freitas Jr, J. A. ; Sombra, A. S. B. . Raman and Infrared Spectroscopy Studies of Linbo3 in Niobate Glass-Ceramics. Journal of Physics and Chemistry of Solids, v. 59, p. 689-694, 1998.
8. Amorim, H. T. ; Araujo, M. T. ; Gouveia, E. A. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Infrared to Visible Frequency Upconversion in Erbium Doped Ga2S3:La2O3 Chalcogenide Glass. Optical Materials, v. 10, p. 241-244, 1998.
9. Oliveira, R. S. ; Paiva, J. A. C. ; Araujo, M. A. B. ; Sombra, A. S. B. . Structural and Electrical Properties of Iron Molybdenum Phosphate Glasses. Il Nuovo Cimento D, v. 20, n. 2, p. 209-220, 1998.
10. Nobrega, K. Z. ; Sombra, A. S. B. . Optimum Self Phase Modulation Profile For Nonlinear Transmission Recovery in Twin Core Optical Couplers With Loss. Optics Communications, v. 151, n. 1-3, p. 31-34, 1998.
11. Santos, P. V. ; Araujo, M. T. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Optical Temperature Sensing Using Upconversion Fluorescence Emission in Er3+/Yb3+ Codoped Chalcogenide Glass. Applied Physics Letters, v. 73, n. 5, p. 578-580, 1998.
12. Silva, J. I. ; Sombra, A. S. B. . Pulse Position Modulation Ppm of Ultrashort Pulse Trains in Optical Fibers. Optics Communications, v. 152, n. 1-3, p. 59-64, 1998.
13. Almeida, E. F. ; Paiva, J. A. C. ; Araujo, M. A. B. ; Araujo, E. B. ; Eiras, J. A. ; Sombra, A. S. B. . Structure of Iron Niobophosphate Glasses Investigated by Dta, Infrared and Mossbauer Spectroscopy. Journal of Physics: Condensed Matter, v. 10, p. 7511-7518, 1998.
14. Silva, M. G. ; Teles, A. F. ; Sombra, A. S. B. . Soliton Switching in Three Core Nonlinear Directional Fiber Couplers. Journal of Applied Physics, v. 84, n. 4, p. 1834-1842, 1998.
1997
1. Araujo, E. B. ; Abreu, J. A. M. ; Oliveira, R. S. ; Paiva, J. A. C. ; Sombra, A. S. B. . Structure and Electrical Properties of Lithium Niobophosphate Glasses. Canadian Journal of Physics, v. 75, p. 747-758, 1997.
2. Abreu, J. A. M. ; Paiva, J. A. C. ; Figueiredo, R. S. ; Araujo, M. A. B. ; Sombra, A. S. B. . Spectroscopic Studies of Iron Niobophosphate Glasses. Physica Status Solidi A, v. 162, p. 515-523, 1997.
3. Araujo, M. T. ; Medeiros Neto, J. A. ; Sombra, A. S. B. ; Oliveira, A. S. ; Gouveia Neto, A. S. . Multiwalength Frequency Doubling in Bulk Gallium-Lanthanum-Sulphide Glasses For Optical Amplifiers at 1.3 Um. Optical Materials, v. 7, p. 1-7, 1997.
1996
1. Ghiner, A. V. ; Sombra, A. S. B. ; Surdutovich, G. I. . Propagation of Light in Doped Media With Regular and Random Distributed Clusters. Coherence and Quantum Optics VII, p. 433-434, 1996.
2. Araujo, E. B. ; Paiva, J. A. C. ; Araujo, M. A. B. ; Sombra, A. S. B. . Structure and Optical Properties of Lithium Niobium Phosphate Glasses and Glass Ceramics. Physica Status Solidi B, v. 197, p. 231-240, 1996.
3. Paiva, J. A. C. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Reversible Non Linear Electrical Switching in Cdtes Doped Glass.Journal of Materials Science, v. 31, n. 13, p. 3601-3604, 1996.
4. Araujo, M. T. ; Vermelho, M. V. D. ; Gouveia Neto, A. S. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Efficient Second Harmonic Generation in Praseodymium Doped Ga:La:S Glass For 1.3Um Optical Fiber Amplifiers. IEEE Photonics Technology Letters, v. 8, p. 821-823, 1996.
5. Paiva, J. A. C. ; Medeiros Neto, J. A. ; Sombra, A. S. B. . Nonlinear Electrical Switching in Cdtes Doped Glass. Physica Scripta, v. 53, p. 631-634, 1996.
6. Paiva, J. A. C. ; Almeida, E. F. ; Hernandes, A. C. ; Sombra, A. S. B. . Dielectric Loss in Ferroelectric Linb03:Fe. Asian Journal of Physics, v. 5, p. 111-115, 1996.
7. Araujo, E. B. ; Paiva, J. A. C. ; Araujo, M. A. B. ; Sombra, A. S. B. . Crystallization of Ferroelectric Linb03 in Niobophosphate Glasses. Physica Scripta, v. 53, p. 104-107, 1996.
1995
1. Araujo, E. B. ; Paiva, J. A. C. ; Sombra, A. S. B. . The Properties and Crystallization of Linb03 in Lithium Niobophosphate Glasses.Journal of Physics: Condensed Matter, v. 7, p. 9723-9730, 1995.
2. Paiva, J. A. C. ; Araujo, E. B. ; Hernandes, A. C. ; Sombra, A. S. B. . Kilohertz Relaxation Process in Linb03:Fe Single Crystals.Physica Status Solidi A, v. 147, p. 585-589, 1995.
1994
1. Sombra, A. S. B. . Semiconductor Optical Bistability and Switching. Brazilian Journal of Physics, v. 24, p. 480-484, 1994.
2. Sombra, A. S. B. . Effect of the Multiphoton Susceptibility on the Characteristics of Semiconductor Devices. Brazilian Journal of Physics, v. 24, p. 485-488, 1994.
1993
1. Sombra, A. S. B. . Nonlinear Switching in Semiconductor Cdsse Doped Glass. Solid State Communications, v. 88, p. 305-308, 1993.
2. Oliveira, C. J. ; Paiva, J. A. C. ; Barbosa, P. C. ; Oliveira, J. C. P. ; Aranha, N. ; Sombra, A. S. B. . Thermally Stimulated Depolarization Current and Mossbauer Spectroscopy of Iron Doped Niobophosphate Glasses. Journal of Materials Science, v. 28, n. 16, p. 4305-4310, 1993.
3. Sombra, A. S. B. ; Sousa, R. C. ; Paiva, J. A. C. ; Mendes Filho, J. . Electrical Properties of Likso4 Crystals at Low Temperatures.Solid State Communications, v. 87, p. 959-962, 1993.
1992
1. Sombra, A. S. B. . Bistable Pulse Collisions of the Cubic-Quintic Nonlinear Schrodinger Equation. Optics Communications, v. 94, p. 92-98, 1992.
2. Sombra, A. S. B. . Optical Bistability and Nonlinear Switching in Cdsse Microcrystallite Doped Glass. Solid State Communications, v. 82, p. 805-808, 1992.
3. Sombra, A. S. B. ; Oliveira, C. J. ; Barbosa, P. C. ; Paiva, J. A. C. ; Oliveira, J. C. P. ; Mendes Filho, J. ; Aranha, N. . Tsdc and Mossbauer Spectroscopy in Iron Doped Heavy Metal Glasses. Boletín de la Sociedad Española de Cerámica y Vidrio, v. 31-C, n. 3, p. 389-393, 1992.
4. Barbosa, P. C. ; Mendes Filho, J. ; Paiva, J. A. C. ; Hernandes, A. C. ; Sombra, A. S. B. . Low Frequency Relaxation Process in Linbo3:Fe Single Crystals. Optical Materials, v. 1, p. 59-63, 1992.
1991
1. Barbosa, P. C. ; Paiva, J. A. C. ; Mendes Filho, J. ; Hernandes, A. C. ; Sombra, A. S. B. . Dielectric Relaxation Process and Pyroelectric Currents in Linbo3:Fe Single Crystals. Physica Status Solidi A, v. 125, p. 723-729, 1991.
1990
1. Sombra, A. S. B. ; Oliveira, J. C. P. ; Mendes Filho, J. ; Moreira, J. E. C. ; Ziemath, E. C. ; Aegerter, M. . Pump and Probe Spectroscopy of a Cr3+ Doped Glass. Solid State Communications, v. 76, p. 183-186, 1990.
2. Sombra, A. S. B. . Induced Probe Beam Modulation and Resonatorless Optical Bistability in Semiconductor (Cdsse) Doped Glass.Optical and Quantum Electronics, v. 22, p. 335-341, 1990.
3. Anslie, B. ; Blow, K. ; Gouveia Neto, A. S. ; Wigley, P. ; Sombra, A. S. B. ; Taylor, J. . Femtosecond Soliton Amplification in Erbium Doped Silica Fibre. Electronics Letters, v. 26, p. 186-187, 1990.
1989
1. Gouveia Neto, A. S. ; Sombra, A. S. B. ; Wigley, P. ; Taylor, J. . Amplification of Picosecond Pulses in Neodymium Doped Single Mode Optical Fibers. Journal of Modern Optics, v. 36, p. 1143-1150, 1989.
2. Sombra, A. S. B. ; Vianna, S. ; Araujo, C. . Excitation of the Eu Polariton in a Centrosymmetric Crystal by Four Wave Mixing.Optical and Quantum Electronics, v. 21, p. 235-240, 1989.
1988
1. Gouveia Neto, A. S. ; Sombra, A. S. B. ; Wigley, P. ; Taylor, J. . Picosecond Pulse Amplification in a Single Mode Neodymium Doped Fibre. Optical Science and Engineering Series 10, v. 10, p. 336-338, 1988.
2. Gouveia Neto, A. S. ; Faldon, M. ; Sombra, A. S. B. ; Wigley, P. ; Taylor, J. . Subpicosecond Pulse Generation Through Cross Phase Modulation Induced Modulation Instability in Optical Fibers. Optics Letters, v. 13, p. 901-903, 1988.
3. Gouveia Neto, A. S. ; Sombra, A. S. B. ; Taylor, J. . A Nd:Yag Lased Pumped Soliton Self:Frequency Shifter. Optics Communications, v. 68, p. 139-142, 1988.
4. Wigley, P. ; Sombra, A. S. B. ; Gouveia Neto, A. S. . A Cw Neodymium Doped Fiber Ring Oscillator. Revista de Física Aplicada e Instrumentação, v. 3, p. 150-154, 1988.
1986
1. Vianna, S. ; Araujo, C. ; Sombra, A. S. B. . Excitation of Coherent Phonon-Polaritons in a Centro-Symmetric Crystal Tio2. Journal of the Optical Society of America B, v. 3, p. 120-121, 1986.
2. Mendes Filho, J. ; Moreira, J. E. C. ; Germano, F. ; Sombra, A. S. B. . Phase Transition in Kliso4. Solid State Communications, v. 60, p. 189-193, 1986.