Conferências Internacionais

2018
1. Morais, J.E.V.; Oliveira, R.G.M.; Sales, J.C.; Castro, A.J.N.; Silva, M.A.S.; Sombra, A.S.B. Dielectric Study In The Microwave Range For Ceramic Composites Based On SR2CONBO6 And TIO2 Mixtures 7th International CongressOn Ceramics, June 17-2, Joz do Iguaçu, Brazil, 2018.
2. Morais, J.E.V.; Bessa, V.L.; Sales, J.C.; Oliveira, R.G.M.; Silva, M.A.S.; Sombra, A.S.B. Magneto-Dielectric Properties Studies Of The Matrix Composite [SRFE12019(SFO)1-X – BIFEO3(BFO)X]7th International CongressOn Ceramics, June 17-2, Joz do Iguaçu, Brazil, 2018.
3. Nascimento, J.P.C; Carmo, F.F,; Façanha, M.X.; Vasconcelos, S.J.T.; Sombra, A.S.b. Synthesis And Down-Conversion Luminescence Of LANBO4:PR3+ Phosphor7th International CongressOn Ceramics, June 17-2, Joz do Iguaçu, Brazil, 2018.
4. Maurício Sousa Pereira, Francisco Anderson Sousa Lima, Thiago Soares Ribeiro, Antonio Sergio Bezerra Sombra and Igor Frota Vasconcelos. DieleEnhanced Stability of Organic Solar Cells Using Fe-doped SnO2 Nanoparticles XVII Brasilian MRS Meeting,16th to 20th of September, in Natal-RN 2018.
5. Maurício Sousa Pereira, Francisco Anderson Sousa Lima, Luis Paulo Mourão do Santos, Juliana Luiza Martins, Diego Bagnis, Antonio Sergio Bezerra Sombra and Igor Frota Vasconcelos. Structural, Magnetic and optical Properties Of Cobalt Ferrite Nanoparticles and Their Application in Flexible Organic Solar Cells XVII Brasilian MRS Meeting,16th to 20th of September, in Natal-RN 2018.
6. Paulo Henrique Teixeira da Silva, Marcelo Antonio Santos da Silva, Alan Silva de Menezes,Welligton Castro Ferreira, Alejandro Pedro Ayala, Antonio Sérgio Bezerra Sombra andPierre Basílio Almeida Fechine. Structural and dielectric behaviour of the four-layer Aurivillius-phase Bi3R2FeTi3O15 (R=Bi, Gd and Nd)XVII Brasilian MRS Meeting,16th to 20th of September, in Natal-RN 2018.
7. R. G. M. Oliveira, J. E. V. Morais, D. B. Freitas,G. S. Batista, M. A. S. Silva, C. Singh and A. S. B.Sombra. The effects of TiO2 addition on the dielectric and microwave properties in the ceramic matrix BiVO4Phagwara, India, India, 19-20 April 2018.
2017
1. J. P. C. do Nascimento, J. C. Sales, A. J. N. de Castro, F. A. G. Silva, R. G. M. de Oliveira, M. A. S. Silva,C. Jacinto, A. S. G. Neto D. X. Gouveia, A. S. B. Sombra. Upconversion fluorescence of Er3+-Yb3+ in the LaNbO4 ceramic., 18th International Conference on Luminescence, Ago 27-set 01, João Pessoa-PB, Brazil, 2017.
2. M. X. Façanha, J. C. Sales, A. J. N. de Castro, F. A. G. Silva, J. E. V de Morais, F. F. do Carmo,C. Jacinto, A. S. G. Neto, D. X. Gouveia, A. S. B. Sombra. Luminescence Up-conversion emission of Er3+/Yb3+ co-doped BaBi2Nb2O9 (BBN) phosphors., 18th International Conference on Luminescence, Ago 27-set 01, João Pessoa-PB, Brazil, 2017.
2013
1. HAAPALAINEN, MERTSI ; DI GIROLAMO, SALVATORE ; SOMBRA, ANTONIO S. B. ; KAMSHILIN, ALEXEI A. . Novel fiber-optic sensor of high electrical alternating currents. In: 3RD INTERNATIONAL TOPICAL MEETING ON OPTICAL SENSING AND ARTIFICIAL VISION: OSAV’2012, 14–17 May, Saint Petersburg, Russia, 2012, AIP Conference Proceedings, v. 1537. p. 107-114, 2013.
2. SILVA, M. A. S. ; FERNANDES, T. S. M. ; SOMBRA, A. S. B. . A new method for the measurement of the microwave temperature coefficient of resonant frequency (τf) of electroceramics. Proc. of the 6th International Conference on Electroceramics, November 9-13, João Pessoa-PB, Brazil, 2013.
3. SANCHO, E O ; FREITAS, D. B. ; ALMEIDA, J.S. ; SALES, J. C. ; SOMBRA, A. S. B. . High dielectric permittivity of SrBi2Nb2O9 (SBN) added Bi2O3. Proc. of the 6th International Conference on Electroceramics, November 9-13, João Pessoa-PB, Brazil, 2013.
4. RODRIGUES, H.O. ; SOMBRA, A. S. B. . Study of dielectric resonator antenna based on multiferroic BiFeO3. Proc. of the 6th International Conference on Electroceramics, November 9-13, João Pessoa-PB, Brazil, 2013.
5. MORAIS, J. E. V. ; CASTRO, A. J. N. ; SILVA, M. A. S. ; SALES, J. C. ; SOMBRA, A. S. B. . Experimental and numerical study of resonator antennas based on Sr2CoNbO6. Proc. of the 6th International Conference on Electroceramics, November 9-13, João Pessoa-PB, Brazil, 2013.
2011
1. 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. . Microwave Dielectric Properties of CaTi1-X(Nb2/3Li1/3)XO3-delta (CNLTOX). In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2011), October 29 – November 01, Natal-RN, Brazil, 2011.
2. GRAÇA, M. P. F. ; GIRÃO, H. T. ; SOMBRA, A. S. B. ; SABOIA, K. D. A. ; COSTA, L ; AMARAL, F. ; VALENTE, M. A. . Microwaves dielectric properties of Y3Fe5O12 CaCu3Ti4O12 composites. In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2011), October 29 – November 01, Natal-RN, Brazil, 2011.
3. SOMBRA, A. S. B. . Dielectric Resonator Antennas Based in BiYWO6 and Operating at 3.3GHz:Electrical Properties Study. In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2011), October 29 – November 01, Natal-RN, Brazil, 2011.
2010
1. FERREIRA, A. C. ; SARAIVA SOBRINHO, C. ; MENEZES, J. W. M. ; ROCHA, H. H. B. ; RODRIGUES, H. O. ; PIRES JUNIOR, G. F. M. ; SOMBRA, A. S. B. ; LIMA, J. L. S. . Optical Logic Gates Using Nonlinear Directional Coupler under Pulse Position Modulation. In:Proc. of the Latin America Optics and Photonics Conference (LAOP 2010), September 26-30, Recife-PE, Brazil, 2010.
2009
1. LIMA, J. L. S. ; NOGUEIRA, R. N. ; TEIXEIRA, A. ; ANDRE, P. S. B. ; PINTO, J. L. ; SOMBRA, A. S. B. . Short Pulse Transmission from Bragg Fabry-Perot Filter. In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2009), November 3-6, Belém-PA, Brazil, 2009.
2. ROCHA, H. H. B. ; SALES, J. C. ; FRAGA, W. B. ; FERREIRA, A. C. ; LIMA, J. L. S. ; SARAIVA SOBRINHO, C. ; MENEZES, J. W. M. ; SOMBRA, A. S. B. . Signal Coupling in Nonlinear Hybrid Optical Structures: A Numerical Approach. In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2009), November 3-6, Belém-PA, Brazil, 2009.
3. MARULANDA, J. I. ; LIMA, R. A. A. ; CARVALHO, M. C. R. ; ALMEIDA, A. F. L. ; SOMBRA, A. S. B. ; DEMENICIS, L. S. . Characterization of dielectric properties of screen-printed MgTiO3 CaTiO3 composite thick films in the microwave frequency range. In: Proc. of the International Microwave and Optoelectronics Conference (IMOC 2009), November 3-6, Belém-PA, Brazil, 2009.
2008
1. SILVA, C. C. ; GRAÇA, M. P. F. ; GOUVEIA, D. X. ; COSTA, L. C. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Dielectric Properties Study of xLiFe5O8-(1-x) LiNbO3 Composites Processed Using Microwave Energy. In: Proc. of the 5th International Conference on Broadband Dielectric Spectroscopy and its Applications, Lyon, France, 2008.
2. GRAÇA, M. P. F. ; SILVA, C. C. ; COSTA, L. C. ; SOMBRA, A. S. B. ; VALENTE, M. A. . Dielectric Properties of SiO2-LiFe5O8 Glass-Ceramics by Sol-Gel Processing. In: Proc. of the 5th International Conference on Broadband Dielectric Spectroscopy and its Applications, Lyon, France, 2008.
3. VALENTE, M. A. ; GRAÇA, M. P. F. ; SILVA, C. C. ; SOMBRA, A. S. B. . Dielectric Spectroscopy of LiNbO3:Tm Nanocrystals Embedded in a SiO2 Glass Matrix. In: Proc. of the 5th International Conference on Broadband Dielectric Spectroscopy and its Applications, Lyon, France, 2008.
2007
1. FECHINE, P. B. A. ; SOMBRA, A. S. B. ; FREITAS JR, J. A. . “Dielectric Studies of metal/n-GaN Schottky diodes in the radio frequency range”. In: Proc. of the 5th International Workshop on Bulk Nitrade Semiconductors, September 24-28, Itaparica, Salvador-BA, Brazil, 2007.
2006
1. WEHMANN, C. F. ; FERNANDES, L. M. ; LIMA, J. L. S. ; SILVA, M. G. ; ALMEIDA, E. F. ; MEDEIROS NETO, J. A. ;SOMBRA, A. S. B. . “Optical Mixing Effect and Modulation Instability in a Dispersion Decreasing Fiber Operating With Picosecond Light Pulses”. In:Proc. of the 6th International Telecommunications Symposium (ITS 2006), September 3-6, Fortaleza-CE, Brazil, 2006.
2. MENESES, J. W. M. ; FRAGA, W. B. ; SILVA, M. G. ; FERREIRA, A. C. ; FURTADO FILHO, A. F. G. ; MORAIS NETO, A. F. ; SARAIVA SOBRINHO, C. ; SOMBRA, A. S. B. . “Numerical Analysis in Triangular and Planar Three-Core Nonlinear Optical Fiber Couplers (TNLDC) Operating Logical Gates”. In: Proc. of the 6th International Telecommunications Symposium (ITS 2006), September 3-6, Fortaleza-CE, Brazil, 2006.
3. FRAGA, W. B. ; MENESES, J. W. M. ; FURTADO FILHO, A. F. G. ; SALES, J. C. ; SILVA, M. G. ; SOMBRA, A. S. B. . “Soliton Optical Gates Whit Asymetric Planar Dual Core Nonlinear Directional Fiber Coupler (DNLDC)”. In: Proc. of the 6th International Telecommunications Symposium (ITS 2006), September 3-6, Fortaleza-CE, Brazil, 2006.
4. MORAIS NETO, A. F. ; SARAIVA SOBRINHO, C. ; FURTADO FILHO, A. F. G. ; MENESES, J. W. M. ; SOMBRA, A. S. B. . “Ultrashort Pulse Reflection Through Nonlinear Fiber Bragg Gratings”. In: Proc. of the 6th International Telecommunications Symposium (ITS 2006), September 3-6, Fortaleza-CE, Brazil, 2006.
5. SILVA, C. C. ; FILHO, F. P. ; LIMA, D. O. ; SOMBRA, A. S. B. ; GRAÇA, M P F ; VALENTE, M. A. . “Dielectrical and Structural Characterization of Iron Doped Hydroxyapatite Bioceramics”. In: Proc. of the 4th Conference International Dielectric Society and 9th International Conference Dielectric and Related Phenomena (IDS & DRP 2006), Poznan, Polonia, 2006.
6. ROCHA, H. H. B. ; FREIRE, F. N. A. ; COSTA, R. C. S. ; SANTOS, M. R. P. ; ORJUBIN, G ; JUNQUEIRA, C C M ; CARVALHO, S. A. ; SILVA, C. C. ; SOMBRA, A. S. B. . “A Resonant Dielectric Cavity Antenna Using Magneto-dielectric Composites: CryFe2-yO3(CrFO)-FexTi1-x/2Cu1-x/2O3 (FCTO)”. In: Proc. of the 4th Conference International Dielectric Society and 9th International Conference Dielectric and Related Phenomena (IDS & DRP 2006), Poznan, Polonia, 2006.
2005
1. SOMBRA, A. S. B. . “High Dielectric Constant Materials for Use in Telecommunications : RF and Microwave Devices” (Invited Paper). In: Proc. of the 3rd International Synposium on Noncrystalline Solids and Brazilian Symposium on Glass and Related Materials, 3rd Isncs and 7th BSGRM, Maringá-Brazil, 2005.
2. SILVA, C. C. ; VALENTE, M. A. ; GRAÇA, M. P. F. ; GOES, J. C. ; SOMBRA, A. S. B. . “The Preparation, Structure and Electrical Properties of Calcium-Sodium-Phosphate Biosystem”. In: Proc. of the 3rd International Synposium on Noncrystalline Solids and Brazilian Symposium on Glass and Related Materials, 3rd ISNCS and 7th BSGRM, Maringá-Brazil, 2005.
3. SILVA, C. C. ; VALENTE, M. A. ; GRAÇA, M. P. F. ; 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. In: Proc. of the III International Materials Symposium and XII Portuguese Materials Society Meeting, Aveiro, Portugal, 2005.
2004
1. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; KRETLY, L. C. ; SASAKI, J. M. ; SOMBRA, A. S. B. . “Study of the Electrical Properties of CaCu3Ti4O12 (CCTO) Substrates for Microwave Devices and Antennas”. In: Proc. of the Third International Conference on High-Performance Ceramics-CICC-3, May 9-12, Shenzhen, Guangdong Province, China, 2004.
2. SILVA, M. ; FIGUEIRO, S. D. ; GOES, J. C. ; SOMBRA, A. S. B. . “Calcium Phosphate Crystal Phase Formation on Surfaces of Collagen Films”. In: Proc. of the 9th International Conference on Electronic Materials-2004 Spring Meeting, Paper W 11.15, April 12-16, San Francisco, CA-USA, 2004.
3. SILVA, M. A. S. ; PAIVA, J. A. C. ; SASAKI, J. M. ; SOMBRA, A. S. B. . “Synthesis of Iron – Hydroxyapatite Obtained by Mecanosynthesis”. In: Proc. of the XX International Congress on Glass (ICG), Kyoto-Japan, 2004.
4. SILVA, M. A. S. ; FIGUEIRO, S. D. ; GOES, J. C. ; SOMBRA, A. S. B. . . “Nucleation of Calcium Phosphate Crystal Phase on Surfaces of Collagen Films”. In: Proc. of the Xx International Congress on Glass (ICG), Kyoto-Japan, 2004.
5. FECHINE, P. B. A. ; ALMEIDA, A. F. L. ; GOES, J. C. ; SOMBRA, A. S. B. . “Electrical and Optical Properties of BaTiO3(BTO)-CaCu3Ti4O12(CCTO) Composite Screen-Printed Thick Films”. In: Proc. of the XX International Congress on Glass (Icg), Kyoto-Japan, 2004.
6. FECHINE, P. B. A. ; ALMEIDA, A. F. L. ; SILVA, C. C. ; SOMBRA, A. S. B. . “Piezoelectricity and Dielectric Permittivity of Barium Titanate-Hydroxyapatite Composite Screen-Printed Thick Films”. In: Proc. of the Xx International Congress on Glass (ICG), Kyoto-Japan, 2004.
7. SILVA, M. A. S. ; SILVA, C. C. ; SALES, B B ; GOES, J. C. ; SASAKI, J. M. ; SOMBRA, A. S. B. . “Hydroxyapatite Caracterization Obtained by Mechanosynthe. In: Proc. of the 4th International Conference on Inorganic Materials“, Antwerp, 2004.
8. SILVA, M. A. S. ; PAIVA, J. A. C. ; SASAKI, J. M. ; SOMBRA, A. S. B. . “Synthesis of Iron-Hydroxyapatite Obtained by Mechano Synthesis”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
9. SILVA, M. A. S. ; TEIXEIRA, J. D. ; GONÇALVES, N. S. ; PINHEIRO, A. G. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Lithium Ferrite Obtained by a New Sol-Gel Meyhod From Powder of Coconut Milk”. In: Proc. of the 4Th International Conference on Inorganic Materials, Antwerp, 2004.
10. SILVA, M. A. S. ; TEIXEIRA, J. D. ; GONÇALVES, N. S. ; PINHEIRO, A. G. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Nickel Ferrite Obtained by A New Sol-Gel Method From Powder of Coconut Milk”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
11. FECHINE, P. B. A. ; ALMEIDA, A. F. L. ; ROCHA, M. J. S. ; SOMBRA, A. S. B. . “Dielectric Properties of the BTO-CCTO System at Low Temperature”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
12. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; KRETLY, L. C. ; SOMBRA, A. S. B. . “Study of the Electrical Properties of BTO-CCTO Composites as Substrates for Microwave Devices and Antennas Applications”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
13. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; ROCHA, M. J. S. ; SOMBRA, A. S. B. . “Preparation of Lead Titanate Powders by Mechanical Alloying”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
14. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; GOES, J. C. ; SOMBRA, A. S. B. . “Dielectric Properties of BTO-CCTO Composite Screen Printed Thick Films for High Dielectric Constant Devices in the Medium Frequency Range”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
15. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; SOMBRA, A. S. B. . “Study of the Electrical Properties of CCTO Thick Film Doped With Some Oxides”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
16. SILVA, M. A. S. ; TEIXEIRA, J. D. ; GONÇALVES, N. S. ; PINHEIRO, A. G. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Preparation of BTO Ceramics Via A High-Energy Ball Milling Process in a Reduced Time”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
17. ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; KRETLY, L. C. ; SOMBRA, A. S. B. . “Calcium and Copper Mixed Phosphates Formation”. In: Proc. of the 4th International Conference on Inorganic Materials, Antwerp, 2004.
18. SOUZA FILHO, A. G. ; VALIM, D. ; FREIRE, P. T. C. ; AYALA, A. P. ; MENDES FILHO, J. ; ALMEIDA, A. F. L. ; FECHINE, P. B. A. ; SOMBRA, A. S. B. . “High Pressure Raman Studies of the Giant-Dielectric Constant CaCu3Ti4O12″. In: Proc. of the 7Th European Conference on Applications of Polar Dielectrics, Liberec, Czech Republic, 2004.
19. GONÇALVES, R. H. ; RICARDO, N. M. P. ; PAIVA, J. A. C. ; GOES, J. C. ; FIGUEIRO, S. D. ; SOMBRA, A. S. B. . “The Effect of Glutaraldehyde Crosslinking on Dielectrical Properties of Collagen-Chitosan Films”. In: Proc. of the Polymer Processing Society, 2004 Americas Regional Mee, Florianopolis-Brazil, 2004.
2003
1. SOMBRA, A. S. B. . “Relaxações Elétricas/Dielétricas em Materiais”. In: Proc. of the VI Seminario Iberoamericano de Mostradores de Informação-VI Infodisplay, Fortaleza-Brazil, 2003.
2. GONÇALVES, R. ; COELHO, I. P. ; FLORES, W. H. ; SILVA, M. A .A. ; OLIVEIRA, R. S. ; SOMBRA, A. S. B. . “Eletrodeposição de Filmes de CDTE e sua Caracterização por Meio de Espectroscopia de Impedancia Elétrica”. In: Proc. of the VI Seminario Iberoamericano de Mostradores de Informação-VI Infodisplay, Fortaleza-Brazil, 2003.
2002
1. GOES, J. C. ; FIGUEIRO, S. D. ; LIMA, C. G. A. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Study of Electrical Conductivity and Piezoelectricity of Collagen/Chitosan Films”. In: Proc. of the Polychar-10 World Forum on Polymer Applications and Theory, Texas-USA, 2002.
2. GOES, J. C. ; FIGUEIRO, S. D. ; MOREIRA, R. A. ; SOMBRA, A. S. B. . “Piezoelectric Galactomannan-Collagen Films for Galactose Binding Lectins”. In: Proc. of the 9th International Meeting on Chemical Sensors, Boston-USA, 2002.
3. FIGUEIRO, S. D. ; MOREIRA, R. A. ; GOES, J. C. ; SOMBRA, A. S. B. . “Galactomannan-Collagen Film for Galactose Binding Lectins Detection”. In: Proc. of the 4th International Symposium on Natural Polymers and Composites, São Pedro-Brazil, 2002.
4. OLIVEIRA, R. S. ; SILVA, M. G. ; SOMBRA, A. S. B. . “DC Conductivity of Collagen-Chitosan Films”. In: Proc. of the 4th International Symposium on Natural Polymers and Composites (ISNAPOL 2002), São Pedro-SP, Brazil, 2002.
2001
1. OLIVEIRA, R. S. ; SILVA, M. G. ; SOMBRA, A. S. B. . “Ultrashort Pulse Switching in a Lossy Acousto-Optic Tunable Filter (AOTF)”. In: Proc. of the Optical Fiber Communication Conference (OFC2001), Anaheim, California, USA, 2001.
2. SOUSA NETO, V. O. ; SILVA, C. C. ; FIGUEIRO, S. D. ; GOES, J. C. ; PAIVA, J. A. C. ; WEHMANN, C. F. ; SOMBRA, A. S. B. . “Study of the Electrical Conductivity and Piezoelectricity in Iron Doped Collagen Films”. In: Proc. of the VI International Conference on Frontiers of Polymers and Advanced Materials, Recife-Brazil, 2001.
3. MELO, A. M. ; OLIVEIRA, R. S. ; LIMA, J. L. S. ; SOMBRA, A. S. B. . “Time Division Multiplexing (OTDM) Using Soliton Pulses in a Terahertz Optical Asymmetric Demultiplexer (TOAD)”. In: Proc. of the Conference on Lasers and Electro-Optics and Quantum Electronics and Laser Science Conference (CLEO/DELS2001), Baltimore-USA, 2001.
4. OLIVEIRA, R. S. ; SILVA, M. G. ; SOMBRA, A. S. B. . “Soliton Switching in a Lossy Acusto-Optic Tunable Filter (AOTF)”. In: Proc. of the Conference on Lasers and Electro-Optics and Quantum Electronics and Laser Science Conference (CLEO/DELS2001), Baltimore-USA, 2001.
5. VASCONCELOS, I. F. ; PIMENTA, M. A. ; SOMBRA, A. S. B. . “Nanocrystalline Ceramics of BSO and BTO”. In: Proc of the XIX International Congress on Glass, 1-7 July, Edinburgh-UK, 2001.
6. THOMAZINI, D. ; SILVA, C. C. ; PINHEIRO, A. G. ; GOES, J. C. ; SOMBRA, A. S. B. . “Piezoelectric Properties Collagen-Nanocrystalline Hydroxyapatite Composite Films”. In: Proc of the XIX International Congress on Glass, 1-7 July, Edinburgh-UK, 2001.
7. ALMEIDA, A. F. L. ; VASCONCELOS, I. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “The Optical and Mossbauer Spectra of Lithium Triborate (LBO) in Borophosphate Glass-Ceramics”. In: Proc of the XIX International Congress on Glass, 1-7 July, Edinburgh-UK, 2001.
8. MELO, A. M. ; OLIVEIRA, R. S. ; LIMA, J. L. S. ; SOMBRA, A. S. B. . “Time Division Multiplexing (OTDM) Using Ultrashort Picosecond Pulses in a Terahertz Optical Asymmetric Demultiplexer (TOAD)”. In: Proc. of the International Microwave and Optoelectronic Conference(IMOC-2001), Belém-Brazil, 2001.
9. OLIVEIRA, R. S. ; SILVA, M. G. ; SOMBRA, A. S. B. . “Picosecond Pulse Switching in a Lossy Acusto-Optic Tunable Filter (AOTF)”. In: Proc. of the International Microwave and Optoelectronic Conference(IMOC-2001), Belém-Brazil, 2001.
10. ALMEIDA, A. F. L. ; MEDEIROS NETO, J. A. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “The Optical and Mossbauer Spectra of Lithium Triborate in Borophosphate Glass-Ceramics”. In: Proc of the Fifth Braziliam Symposium on Glass and Related Materials, Foz do Iguaçu, Brazil, 2001.
11. THOMAZINI, D. ; SILVA, C. C. ; PINHEIRO, A. G. ; GOES, J. C. ; SOMBRA, A. S. B. . “Electric Properties of Collagen-Nanocrystalline Hydroxyapatite Composite Films”. In: Proc of the Fifth Braziliam Symposium on Glass and Related Materials, Foz do Iguaçu, Brazil, 2001.
12. SILVA, C. C. ; THOMAZINI, D. ; PINHEIRO, A. G. ; VALENTE, M. A. ; SASAKI, J. M. ; SOMBRA, A. S. B. . “Structural Properties of Hidroxyapatite Obtained by Mechanical Alloying”. In: Proc of the Fifth Braziliam Symposium on Glass and Related Materials, Foz do Iguaçu, Brazil, 2001.
13. CRUZ, A. G. B. ; FEITOSA, J. P. A. ; GOES, J. C. ; SOMBRA, A. S. B. . “On the Piezoelectricity of Collagen/Natuaral Rubber Blend Films”. In: Proc. of the Polymers in the Third Millenium, Montpellier-France, 2001.
2000
1. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “The Effect of PH on the Dielectric Properties of Anionic Collagen Films”. In: Proc. of the International Conference on Polymer Characterization, Denton-USA, 2000.
2. ANDRADE, J. S. ; PINHEIRO, A. G. ; PAIVA, J. A. C. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Structural Studies of KNbO3 in Niobate Glass-Ceramics”. In: Proc. of the XII International Symposium on Non Oxide Glasses and Advanced Materials, Florianópolis-Brazil, 2000.
3. SANTOS, P. V. ; GOUVEIA, E. A. ; ARAUJO, M. T. ; BENEDICTO, S. ; RIBEIRO, S. J. L. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. . “Upconversion Spectroscopy and Thermal Effects in Anty-Stokes Infrared Excited Yb3+ sensitized Pr3+ Doped Ga2O3-La2S3 Chalcogenide Glasses”. In: Proc. of the XII International Symposium on Non Oxide Glasses and Advanced Materials, Florianópolis-Brazil, 2000.
4. NOBREGA, K. Z. ; SILVA, M. G. ; SOMBRA, A. S. B. . “Analytical and Numerical Studies on Increasing Nonlinearity Fiber Couplers”. In: Proc. of the Progress in Electromagnetics Reserach Symposium (PIERS2000), Massachusetts-USA, 2000.
5. GOES, J. C. ; FIGUEIRO, S. D. ; ARANHA, N. ; SOMBRA, A. S. B. . “Piezoelectric Effect in Collagen-Bioceramic Composite”. In:Proc. of the Third International Symposium on Natural Polymers and Composites (ISNAPOL2000), São Paulo-Brazil, 2000.
6. ALMEIDA, A. F. L. ; VASCONCELOS, I. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Structural Studies of Lithium Triborate (LBO-LiB3O5) in Borophosphate Glass-Ceramics”. In: Proc. of the Second International Conference on Inorganic Materials, Santa Barbara-USA, 2000.
7. VASCONCELOS, I. F. ; PIMENTA, M. A. ; SOMBRA, A. S. B. . “Optical Properties of Bi12Sio20(Bso) and Bi12TiO20(Bto) Obtained by Mechanical Alloying”. In: Proc. of the Second International Conference on Inorganic Materials, Santa Barbara-USA, 2000.
8. GOES, J. C. ; ARANHA, N. ; AMORIM, H. T. ; SOMBRA, A. S. B. . “Collagen-Hydroxyapatite Films: Piezoelectric Properties”. In:Proc. of the Second International Conference on Inorganic Materials, Santa Barbara-USA, 2000.
9. ANDRADE, J. S. ; VASCONCELOS, I. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Optical and Structural Studies of Knbo3 in Niobate Glass Ceramics”. In: Proc. of the Second International Conference on Inorganic Materials, Santa Barbara-USA, 2000.
10. ALMEIDA, A. F. L. ; THOMAZINI, D. ; VASCONCELOS, I. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Structural Properties of Lithium Triborate(LBO-LiB3O5) in Borophosphate Glass-Ceramics”. In: Proc. of the 8th International Conference on the Structure of Non-Crystalline Materials, Aberystwyth-UK, 2000.
11. ALMEIDA, A. F. L. ; VASCONCELOS, I. F. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Mossbauer Studies of Lithium Triborate(LBO-LiB3O5) in Borophosphate Glass-Ceramics”. In: Proc. of the International Symposium on the Industrial Applications of the Mossbauer Effect (ISIAME2000), Virginia-USA, 2000.
1999
1. SOMBRA, A. S. B. ; NOBREGA, K. Z. ; SILVA, M. G. . “Investigation of Switching Characteristics in a Twin Core Nonlinear Directional Coupler Using a Variational Method”. In: Proc. of the Ieee Lasers and Electro Optics Society Meeting, San Francisco-USA, 1999.
2. SOMBRA, A. S. B. ; NOBREGA, K. Z. ; SILVA, M. G. . “Numerical Studies in Twin Core Directional Couplers Using Asymmetric Nonlinear Refractive Index Profile”. In: Proc. of the International Microwave and Optoelectronics Conference, Rio de Janeiro, Brazil, 1999.
3. SILVA, M. G. ; NOBREGA, K. Z. ; SOMBRA, A. S. B. . “Dispersion Profile Studies on Twin Core Directional Fiber Couplers”. In: Proc. of the International Microwave and Optoelectronics Conference, Rio de Janeiro, Brazil, 1999.
4. LIMA, J. L. S. ; SOMBRA, A. S. B. . “Ultrafast Optical Switching in Nonlinear Loop Mirror (NOLM) Constructed From Dispersion Decreasing Fiber (DDF)”. In: Proc. of the International Microwave and Optoelectronics Conference, Rio de Janeiro, Brazil, 1999.
5. FELIX, S. F. ; GOUVEIA, E. A. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. . “Thermally Induced Upconversion Emission Enhancement in Multiphonon Assisted Anti Stokes Infrared Excited Yb3+ Sensitized Er3+ Doped Glass”. In: Proc. of the International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL99), Osaka-Japan, 1999.
6. FELIX, S. F. ; GOUVEIA, E. A. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. . “Upconversion Pumped Light Amplification With Temperature Tunable Gain in ER3+/Yb3+ Codoped Chalcogenide Glasses”. In: Proc. of the International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL99), Osaka-Japan, 1999.
7. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; VASCONCELOS, I. F. ; SOMBRA, A. S. B. . “On the Piezoelectricity of Anionic Collagen Films”. In: Proc. of the Third International Symposium on Inorganic Phosphate Materials, Villeneuve D’Ascq, France, 1999.
8. ALMEIDA, E. F. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Dielectric Complex Function Studies of LiNbo3 in Niobate Glass-Ceramics”. In: Proc. of the Third International Symposium on Inorganic Phosphate Materials, Villeneuve D’Ascq, France, 1999.
9. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Dielectric and Piezoelectric Studies of Anionic Collagen Films”. In: Proc. of the International Conference on Polymer Characterization (POLYCHAR-7), Denton-USA, 1999.
10. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “On the Piezoelectricity of Anionic Collagen Films”. In: Proc. of the Materials Research Society Spring Meeting, San Francisco-USA, 1999.
11. VALENTE, M. A. ; SOMBRA, A. S. B. ; GRAÇA, M. P. . “Electron Paramagnetic Resonance Study of Fe2O3 Doped Potassium Niobophosphate Glasses”. In: Proc. of the 4th Brasilian Symposium on Glasses and Related Materials, Ouro Preto, Brazil, 1999.
12. 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+ Doped Chalcogenide Glasses”. In: Proc. of the 4th Brasilian Symposium on Glasses and Related Materials, Ouro Preto, Brazil, 1999.
13. ARAUJO, E. B. ; EIRAS, J. A. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Structure, Nucleation and Crystallization Mechanism of 50Li2O-50P2O5-XFe2O3 Glasses”. In: Proc. of the 4th Brasilian Symposium on Glasses and Related Materials, Ouro Preto, Brazil, 1999.
14. VALENTE, M. A. ; GRAÇA, M P ; SOMBRA, A. S. B. . “Raman and Infrared Spectra of LiNbO3 Doped With MGO in Niobophosphate Glasses”. In: Proc. of the 4th Brasilian Symposium on Glasses and Related Materials, Ouro Preto, Brazil, 1999.
15. ANDRADE, J. S. ; PINHEIRO, A. G. ; PAIVA, J. A. C. ; VALENTE, M. A. ; SOMBRA, A. S. B. . “Raman and Infrared Spectra of KNbO3 in Niobate Glass-Ceramics”. In: Proc. of the 4th Brasilian Symposium on Glasses and Related Materials, Ouro Preto, Brazil, 1999.
1998
1. OLIVEIRA, A. S. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; MEDEIROS NETO, J. A. ; SOMBRA, A. S. B. . “Upconversion Spectroscopy in Rare Earth Doped Chalcogenide Glasses”. In: Proc. of the European Conference on Lasers and Electro-Optics (CLEO Europe 98), Edinburgh-UK, 1998.
2. SILVA, M. G. ; TELES, A. F. ; SOMBRA, A. S. B. . “Soliton Switching in Triangular Three Core Nonlinear Directional Fiber Coupler”. In: Proc. of the International Telecommunications Symposium (ITS98), São Paulo-Brazil, 1998.
3. NOBREGA, K. Z. ; SOMBRA, A. S. B. . Nonlinear Switching Recovery in Planar Directional Coupler With Loss. In: Proc. of the International Telecommunications Symposium (ITS98), São Paulo-Brazil, 1998.
4. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Physicochemical of Collagen-Chitosan Composites”. In:Proc. of the Second International Symposium on Natural Polymers and Composites (ISNAPOL/98), São Paulo-Brazil, 1998.
5. SOMBRA, A. S. B. ; ALMEIDA, E. F. . “Piezoelectric Resonators Studies in LiNbO3 Microcrystals in Niobate Glass-Ceramics”. In:Proc. of the First International Conference on Inorganic Materials, Versailles-France, 1998.
6. OLIVEIRA, R. S. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Structural Studies of Molybdenum Phosphate Glasses”. In: Proc. of the First International Conference on Inorganic Materials, Versailles-France, 1998.
7. ARAUJO, E. B. ; FREITAS JR, J. A. ; SOMBRA, A. S. B. . “Structural Studies Using Raman and Infrared Spectroscopy of LiNbO3 in Niobate Glass and Glass Ceramics”. In: Proc. of the First International Conference on Inorganic Materials, Versailles-France, 1998.
8. NOBREGA, K. Z. ; SOMBRA, A. S. B. . “Optimum Self Phase Modulation Profile for Nonlinear Transmission Recovery in Twin Core Optical Coupler With Loss”. In: Proc. of the Progress in Electromagnetics Research Symposium (PIERS98), Nantes-France, 1998.
9. SILVA, M. G. ; TELES, A. F. ; SOMBRA, A. S. B. . “Soliton Switching in Three Core Nonlinear Directional Fiber Couplers”. In: Proc. of the Progress in Electromagnetics Research Symposium (PIERS98), Nantes-France, 1998.
10. SILVA, J. I. ; SOMBRA, A. S. B. . “Pulse Position Modulation (Ppm) of Ultrashort Pulse Trains in Optical Fibres”. In: Proc. of the Progress in Electromagnetics Research Symposium (PIERS98), Nantes-France, 1998.
11. MEDEIROS NETO, J. A. ; ARANHA, N. ; SOMBRA, A. S. B. . “An Ultrastable Chalcogenide Glass System for Optical Fiber Amplifiers at 1.3um”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
12. AMORIM, H. T. ; ARAUJO, M. T. ; GOUVEIA, E. A. ; GOUVEIA NETO, A. S. ; MEDEIROS NETO, J. A. ; SOMBRA, A. S. B. . “Upconversion Fluorescence in Erbium Doped Ga2S3-La2O3 Chalcogenide Glass”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
13. OLIVEIRA, A. S. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; MEDEIROS NETO, J. A. ; SOMBRA, A. S. B. ; MESSADDEQ, Y. . “Infrared To Visible Upconversion Spectroscopy of Rare-Earth-Doped Chalcogenide Glasses”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
14. OLIVEIRA, A. S. ; ARAUJO, M. T. ; MEDEIROS NETO, J. A. ; ARANHA, N. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. . “Upconversion Spectroscopy of Er3+/Yb3+ Doped Heavy Metal Germanoniobate Glass”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
15. ARAUJO, M. T. ; VERMELHO, M. V. D. ; GOUVEIA NETO, A. S. ; MEDEIROS NETO, J. A. ; SOMBRA, A. S. B. . “Second Harmonic Generation in Praseodymium Doped Ga:La:S Glasses for Optical Fiber Amplifiers”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
16. ARAUJO, E. B. ; FREITAS JR, J. A. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Raman and Infrared Spectroscopy Studies of LiNbO3 in Niobate Glass and Glass Ceramics”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
17. 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”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
18. ALMEIDA, E. F. ; SOMBRA, A. S. B. . “Dielectric Relaxation and Piezoelectric Resonator Studies of LiNbO3 in Niobate Glass-Ceramics”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
19. OLIVEIRA, R. S. ; PAIVA, J. A. C. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Structural and Electrical Properties of Iron Molybdenum Phosphate Glasses”. In: Proc. of the XVIII International Congress on Glass, San Francisco-USA, 1998.
20. GOES, J. C. ; FIGUEIRO, S. D. ; PAIVA, J. A. C. ; SOMBRA, A. S. B. . “Dielectric Properties and Rheological Characterization of Collagen-Chitosan Composites”. In: Proc. of the International Conference on Polymer Characterization-Polychar-6, (POLYCHAR-6), Denton-USA, 1998.
21. FIGUEIREDO, R. S. ; MESSAI, A. ; PAIVA, J. A. C. ; HERNANDES, A. C. ; SOMBRA, A. S. B. . “Mechanical Alloying as AaMethod To Obtain Piezoelectric Ceramics”. In: Proc. of the 9th International Conference on Modern Materials and Technologies, Florence-Italy, 1998.
1997
1. SOMBRA, A. S. B. . “All Optical Switching Devices and Communication Systems”. In: Proc. of the Synposium on Lasers and Their Applications (SLA97), Campinas-Brazil, 1997.
2. OLIVEIRA, R. S. ; PAIVA, J. A. C. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Structural and Electrical Studies of Iron Molybdenum Phosphate Glasses”. In: Proc. of the International Conference on the Applications of the Mossbauer Effect, Rio de Janeiro, Brazil, 1997.
3. SILVA, J. I. ; SOMBRA, A. S. B. . “Pulse Position Modulation (Ppm) of Ultrashort Pulse Trains in Optical Fibres”. In: Proc. of the 1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, Natal-Brazil, 1997.
4. SILVA, M. G. ; SOMBRA, A. S. B. . “All Optical Switching in Three Core Nonlinear Fiber Couplers”. In: Proc. of the 1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, Natal-Brazil, 1997. P.670-675.
5. SOMBRA, A. S. B. ; FREITAS JR, J. A. ; PAIVA, J. A. C. ; ARAUJO, E. B. ; ALMEIDA, E. F. . “Structure and Optical Properties of LiNbO3 in Niobate Glass and Glass-Ceramics”. In: Proc. of the 7Th International Conference on the Structure of Non Crystalline Materials (NCM-7), Sardegna-Italy, 1997.
1996
1. ARAUJO, M. A. B. ; ABREU, J. A. M. ; PAIVA, J. A. C. ; FIGUEIREDO, R. S. ; SOMBRA, A. S. B. . “Spectroscopic Studies of Iron Niobophosphate Glasses”. In: Proc. of the Fifth Latin American Conference on the Applications of the Mossbauer Effect, Cusco-Peru, 1996.
2. PAIVA, J. A. C. ; GHINER, A. V. ; HERNANDES, A. C. ; SURDUTOVICH, G. I. ; SOMBRA, A. S. B. . “Nature of Super Narrow Resonances of the Complex Dielectric Function of LiNbO3 Crystals”. In: Proc. of the Optical Society of American Annual Meeting, Rochester-USA, 1996.
3. GHINER, A. V. ; SURDUTOVICH, G. I. ; SOMBRA, A. S. B. . “Exact Solution of the Problem of Dielectric Anisotropic Ellipsoid in External Electric Field and Frolich Theorem for Anisotropic Media”. In: Proc. of the Optical Society of American Annual Meeting, Rochester-USA, 1996.
4. ARAUJO, E. B. ; PAIVA, J. A. C. ; BEZERRA, C. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Crystallization of LiNbO3 in Lithium Niobophosphate Glasses”. In: Proc. of the International Symposium on Glass Crystallization, Florianopolis-Brazil, 1996.
5. VERMELHO, M. V. D. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. ; MEDEIROS NETO, J. A. . “Efficiency Frequency Doubling in Praseodymium Doped Ga:La;S Glass for 1.3um Optical Fiber Amplifiers”. In: Proc. of the XX International Quantum Electronics Conference (IQEC-96), Sydney-Australia, 1996.
6. VERMELHO, M. V. D. ; ARAUJO, M. T. ; GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. ; MEDEIROS NETO, J. A. . “Second Harmonic Generation in PR3+ Doped Gallium-Lanthanum-Sulphide Glasses for Optical Fiber Amplifiers at 1.3um”. In: Proc. of the European Conference on Lasers and Electro-Optics, (CLEO/Europe 96), Hamburg-Germany, 1996.
1995
1. RIBEIRO, J. W. ; SILVA, B. L. ; COTTA, R. M. ; SOMBRA, A. S. B. . “Analytical Numerical Analysis of Internal Contact Drying of Porous Sheet”. In: Proc. of the Sixth Asian Congress of Fluid Mechanics, Singapore, 1995.
2. SOMBRA, A. S. B. ; PAIVA, J. A. C. ; MEDEIROS NETO, J. A. . “Bistable Electrical Switching in Semiconductor (Cdtes) Doped Glass”. In: Proc. of the 7th Brazilian Workshop on Semiconductor Physics, Rio de Janeiro-Brazil, 1995.
3. GHINER, A. V. ; SOMBRA, A. S. B. ; SURDUTOVICH, G. I. . “Local Field Corrections and Spectral Shifts in Doped Crystals and Glasses With Clustered Impurities”. In: Proc. of the Symposium on Spectral Effects in Collective Phenomena, Rochester-USA, 1995.
4. GHINER, A. V. ; SOMBRA, A. S. B. ; SURDUTOVICH, G. I. . “Propagation of Light in Doped Media With Regular and Random Distributed Clusters”. In: Proc. of the 7th Rochester Conference on Coherence and Quantum Optics, Rochester-USA, 1995.
5. SOMBRA, A. S. B. ; PAIVA, J. A. C. ; MEDEIROS NETO, J. A. . “Bistable Nonlinear Switching in Semiconductor Cdtes Doped Glass”. In: Proc. of the XVII International Congress on Glass, Beijing-China, 1995.
6. ARAUJO, E. B. ; PAIVA, J. A. C. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Study of Lithium Niobophosphate Glasses by Thermally Stimulated Currents and Mossbauer Spectroscopy”. In: Proc. of the XVII International Congress on Glass, Beijing-China, 1995.
7. ARAUJO, E. B. ; PAIVA, J. A. C. ; ARAUJO, M. A. B. ; SOMBRA, A. S. B. . “Structure and Properties of Nb2O5-P2O5-Li2O-Fe2O3 Glasses Prepared by Melt Quenching”. In: Proc. of the International Conference on the Applications of the Mossbauer Effect (ICAME-95), Rimini-Italy, 1995.
1994
1. SOMBRA, A. S. B. ; PAIVA, J. A. C. ; MENDES FILHO, J. ; SOUSA, R. C. . “Phase Transitions and Pyroelectricity in KliSO4 Single Crystals”. In: Proc. of the International Conference on Raman Spectroscopy, Hong Kong-China, 1994.
1993
1. SOMBRA, A. S. B. ; PAIVA, J. A. C. ; MEDEIROS NETO, J. A. . “Electrical Threshold Switching in Semiconductor Doped Glass”. In:Proc. of the International Symposium on Glass Science and Technology, Athens-Greece, 1993.
1992
1. OLIVEIRA, C. J. ; BARBOSA, P. C. ; PAIVA, J. A. C. ; ARANHA, N. ; SOMBRA, A. S. B. . “TSDC and Mossbauer Spectroscopy in Iron Doped Heavy Metal Glasses”. In: Proc. of the XVI International Congress on Glass, Madrid-Spain, 1992.
1991
1. SOMBRA, A. S. B. ; MENDES FILHO, J. . “Optical Bistability and Switching on Microcrystallites Composite Semiconductors”. In:Proc. of the V Brazilian School on Semiconductor Physics, Sao Paulo-Brazil, 1991.
1990
1. SOMBRA, A. S. B. ; MENDES FILHO, J. . “Nonlinear Optical Properties of Microcrystallites Composite Materials”. In: Proc. of the VI Latin American Symposium on Surface Physics, São Paulo-Brazil, 1990.
1988
1. GOUVEIA NETO, A. S. ; SOMBRA, A. S. B. ; WIGLEY, P. G. I. ; TAYLOR, J. R. . “Picosecond Pulse Amplification in Single Mode Neodymium Doped Fibre”. In: Proc. of the I European Conference on Quantum Electronics, Hannover-Germany, 1988.
2. SOMBRA, A. S. B. ; ARAUJO, C. B. . “Coherent Excitation of the Upper Polariton Branch in TiO2 by Four Wave Mixing”. In: Proc. of the Advances in Laser Science IV, Bulletin of the American Physical Society, Atlanta-USA, 1988.
3. SOMBRA, A. S. B. ; ARAUJO, C. B. . “Phonon Polariton Excitation in Tio2 from a Quadrupole Assisted Four Wave Mixing Process”. In: Proc. of the I European Conference on Quantum Electronics, Hannover-Germany, 1988.
4. GOUVEIA NETO, A. S. ; FALDON, M. ; SOMBRA, A. S. B. ; WIGLEY, P. G. I. ; TAYLOR, J. R. . “Modulation Instability Induced Through Cross Phase Modulation from Pulses in the Normal Dispersion Regime”. In: Proc. of the XVI International Conference on Quantum Electronics (IQEC), Tokyo-Japan, 1988.