| Texto completo | |
| Autor(es): |
Oliveira, Israel Alves
[1]
;
Gomes de Souza, Igor Leonardo
[2]
;
Rodriguez-Esquerre, Vitaly Felix
[1]
Número total de Autores: 3
|
| Afiliação do(s) autor(es): | [1] Univ Fed Bahia, Grad Sch Elect Engn, BR-40210630 Salvador, BA - Brazil
[2] Fed Univ Bahia ICTI UFBA, Inst Sci Technol & Innovat, BR-42802721 Camacari - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SCIENTIFIC REPORTS; v. 11, n. 1 NOV 9 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Structures absorbing electromagnetic waves in the infrared spectral region are important optical components in key areas such as biosensors, infrared images, thermal emitters, and special attention is required for reconfigurable devices. We propose a three-dimensional metal-dielectric plasmonic absorber with a layer of PCM's (Phase Change Materials). The phase shift effects of PCMs are numerically analyzed, and it is possible to obtain a shifting control of the resonant absorption peaks between the amorphous and crystalline states using the Lorentz-Lorenz relation. By using this empirical relation, we analyzed the peak absorption shift at intermediate phases between the amorphous and the crystalline. The geometric parameters of the structure with the PCM layer in the semi-crystalline state were adjusted to exhibit strong absorption for normal incidence. The effects of the oblique incidence on the absorption for the TM and TE polarization modes were also analyzed. Our results demonstrate that PCMs have great potential for reconfigurable nanophotonic devices. (AU) | |
| Processo FAPESP: | 15/24517-8 - Fotônica para internet de nova geração |
| Beneficiário: | Hugo Enrique Hernández Figueroa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |