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https://repositorio.ufrn.br/handle/123456789/30163| Título: | Omnidirectional band gaps in quasiperiodic photonic crystals in the THz region |
| Autor(es): | Araújo, C.A.A. Vasconcelos, Manoel Silva de Mauriz, Paulo Wilson Albuquerque, Eudenilson Lins de |
| Palavras-chave: | Photonic crystals;Quasiperiodic structures;Metamaterials;Omnidirectional band gaps |
| Data do documento: | 2012 |
| Editor: | Elsevier |
| Referência: | ARAÚJO, C.A.A.; VASCONCELOS, M.S.; MAURIZ, P.W.; ALBUQUERQUE, E.L.. Omnidirectional band gaps in quasiperiodic photonic crystals in the THz region. Optical Materials, [s.l.], v. 35, n. 1, p. 18-24, nov. 2012. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925346712002753?via%3Dihub. Acesso em: 08 Set. 2020. http://dx.doi.org/10.1016/j.optmat.2012.06.011. |
| Resumo: | In this work we calculate the emittance spectra of the electromagnetic radiation normally and obliquely incident (s- and p-polarized modes) on a one-dimensional multilayer quasiperiodic photonic structure made up by layered system of positive (SiO2) and negative (LiTaO3) refractive index materials organized in a quasiperiodic (Fibonacci-like) fashion. We model the negative refractive index material by an effective medium, whose electric permittivity ϵ(ω) is characterized by a phonon-polariton frequency dependent dielectric function, while for the magnetic permeability μ(ω) we have a Drude-like frequency-dependent function. The emittance spectra are determined by means of a well known theoretical model based on Kirchoff’s second law, together with a transfer matrix formalism. Our results shows that the omnidirectional band gaps appear in the THz regime, in well defined frequency intervals independently of the electromagnetic radiation’s polarized modes |
| URI: | https://repositorio.ufrn.br/jspui/handle/123456789/30163 |
| ISSN: | 0925-3467 |
| Aparece nas coleções: | CB - DBF - Artigos publicados em periódicos ECT - Artigos publicados em periódicos |
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| Arquivo | Descrição | Tamanho | Formato | |
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| OmnidirectionalBandGaps_Vasconcelos_2012.pdf | 1,32 MB | Adobe PDF | Visualizar/Abrir |
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