| Full text | |
| Author(s): |
Oliveira, Israel Alves
[1]
;
Gomes de Souza, Igor Leonardo
[2]
;
Rodriguez-Esquerre, Vitaly Felix
[1]
Total Authors: 3
|
| Affiliation: | [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
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | SCIENTIFIC REPORTS; v. 11, n. 1 NOV 9 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 15/24517-8 - Photonics for next generation internet |
| Grantee: | Hugo Enrique Hernández Figueroa |
| Support Opportunities: | Research Projects - Thematic Grants |