Zobrazeno 1 - 10
of 14
pro vyhledávání: '"K. D. A. Sabóia"'
Publikováno v:
Advances in Materials Science and Engineering, Vol 2018 (2018)
The CaCu3Ti4O12 (CCTO) ceramic powder was inserted in the polyvinyl alcohol (PVA) polymeric matrix, with an increasing weight fraction of the filler, to form a flexible and high dielectric constant composite at the GHz region. The structural characte
Externí odkaz:
https://doaj.org/article/fb5615330a1c470382fce7f2dcf87b34
Autor:
Francisco Nivaldo Aguiar Freire, K. D. A. Sabóia, W. M. Barcellos, Antonio Sergio Bezerra Sombra, Luís Costa, M.P.F. Graça, Filipe Amaral, M.A. Valente
Publikováno v:
Spectroscopy Letters. 50:206-213
This work presents a study on the dielectric and magnetic properties of the yttrium ferrite/calcium copper titanate composites. Their structural properties were analyzed by X-ray diffraction, density, and scanning electron microscopy. Impedance and m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5dc511af66acdf970f3bcb61c14ae882
https://doi.org/10.1080/00387010.2017.1282525
https://doi.org/10.1080/00387010.2017.1282525
Autor:
B. S. Araújo, K. D. A. Sabóia, Antonio Sergio Bezerra Sombra, F. A. A. Aguiar, M. C. Campos Filho, Alejandro Ayala, A. J. M. Sales, Pierre Basílio Almeida Fechine
Publikováno v:
Journal of Electronic Materials. 46:2467-2475
Bi5FeTi3O15 (BFT) polycrystalline ceramic with the addition of different concentrations of V2O5 was obtained by a solid-state method. X-ray powder diffraction, Raman spectroscopy and scanning electron microscopy (SEM) were used to study the microstru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1be4b2eccf1213f4552e0bea5198dcc4
https://doi.org/10.1007/s11664-017-5312-4
https://doi.org/10.1007/s11664-017-5312-4
Autor:
Antonio Sergio Bezerra Sombra, J. W. M. Menezes, C. S. Sobrinho, K. D. A. Sabóia, Alex Sander Barros Queiroz, Francisco Tiago Lima
Publikováno v:
Journal of Electromagnetic Analysis and Applications. :112-117
In this paper we report for the first time the presence of bistability in an acoustic-optic tunable filter (AOTF) operating with ultrashort (2 ps) optical light pulses. The results for the study of bistability has shown the dependence of the hysteres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30bf71719ca7c5685627821729870a1e
https://doi.org/10.4236/jemaa.2012.43015
https://doi.org/10.4236/jemaa.2012.43015
Autor:
Antonio Sergio Bezerra Sombra, C. S. Sobrinho, J. W. M. Menezes, Marcelo L. Lyra, A. C. Ferreira, W. B. Fraga, K. D. A. Sabóia
Publikováno v:
Optical and Quantum Electronics. 41:963-980
A new optical encryption method using an acousto-optic tunable filter (AOTF) operating simultaneously with pulse position modulation (PPM) and pulse amplitude modulation (PAM) is proposed in this paper. This device operates with ultrashort soliton li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f015fdc808135a604689dd1cde63d19
https://doi.org/10.1007/s11082-010-9409-8
https://doi.org/10.1007/s11082-010-9409-8
Autor:
C. S. Sobrinho, J. W. M. Menezes, K. D. A. Sabóia, A. C. Ferreira, F. T. Lima, W. B. Fraga, A. F. G. F. Filho, G. F. Guimarães, Josué Mendes Filho, Almir Wirth Lima, H.H.B. Rocha, Antonio Sergio Bezerra Sombra
Publikováno v:
Optical and Quantum Electronics. 41:121-130
In this paper, we have presented a numerical analysis of the stability of optical bullets (2 + 1), or spatiotemporal solitons (2 + 1), in a planar waveguide with cubic–quintic nonlinearity. The optical spatiotemporal solitons are the result of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8554606c873b26663a0f3ea49e7f60a5
https://doi.org/10.1007/s11082-009-9331-0
https://doi.org/10.1007/s11082-009-9331-0
Autor:
K. D. A. Sabóia, J. W. M. Menezes, Antonio Sergio Bezerra Sombra, W. B. Fraga, C. S. Sobrinho, A. C. Ferreira, H.H.B. Rocha, G. F. Guimarães, S.P. Marciano, A. F. G. F. Filho
Publikováno v:
Optics Communications. 281:1056-1064
In this paper we propose the operation of an all-optical logical gate based in a symmetric nonlinear directional coupler (NLDC) operating with a pulse position modulation (PPM). The performance of a symmetric NLDC realizing two-input AND/OR logical f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a53d4221490d669ea4b1da0698947cfb
https://doi.org/10.1016/j.optcom.2007.10.046
https://doi.org/10.1016/j.optcom.2007.10.046
Autor:
J. W. M. Menezes, J. C. Sales, J.L.S. Lima, Antonio Sergio Bezerra Sombra, G. F. Guimarães, W.B. de Fraga, K. D. A. Sabóia
Publikováno v:
Optical Fiber Technology. 14:79-83
The nonlinear optical transmission of an optical ring resonator (ORR) operating in the soliton regime is investigated numerically. The transmission and the average compression factor of the switched pulses are analyzed. We present results of the stud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9425259e4a987fdbee2eb7187260ba0d
https://doi.org/10.1016/j.yofte.2007.07.004
https://doi.org/10.1016/j.yofte.2007.07.004
Autor:
W.B. de Fraga, K. D. A. Sabóia, J. R. R. Sousa, J. W. M. Menezes, A. C. Ferreira, Antonio Sergio Bezerra Sombra, A. F. G. F. Filho, H.H.B. Rocha, G. F. Guimarães
Publikováno v:
Optical and Quantum Electronics. 39:1191-1206
In this paper we did a study of logic gates obtained in the operation of a three-core non linear directional coupler (TNLDC) and an asymmetric two-core coupler (DNLDC) operating in the CW regime (the laser signals have the same wavelength). The symme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97084b29ee7b6a7917c676db8446e68f
https://doi.org/10.1007/s11082-008-9186-9
https://doi.org/10.1007/s11082-008-9186-9
Autor:
J. C. Sales, G. F. Guimarães, K. D. A. Sabóia, C.S.N. Rios, Antonio Sergio Bezerra Sombra, H.H.B. Rocha, C. S. Sobrinho, S.P. Marciano
Publikováno v:
Optics Communications. 275:476-485
In this paper we propose the operation of an all-optical logical gate based in an acousto optical tunable filter (AOTF) operating with a pulse position modulation (PPM). The performance of an AOTF realizing two-input AND/OR logical functions, which c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::681134c933453cb40b90dcba2d772804
https://doi.org/10.1016/j.optcom.2007.03.058
https://doi.org/10.1016/j.optcom.2007.03.058