Tunable polarization-independent and angle-insensitive broadband terahertz absorber with graphene metamaterials.
Opt Express
; 29(5): 7158-7167, 2021 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-33726222
ABSTRACT
In this paper, we design a polarization-independent and angle-insensitive broadband THz graphene metamaterial absorber based on the surface plasmon-polaritons resonance. Full-wave simulation is conducted, and the results show that the designed metamaterial absorber has an absorption above 99% in the frequency range from 1.23 THz to 1.68 THz, which refers to a very high standard. Furthermore, the absorber has the properties of tunability, and the absorption can be nearly adjusted from 1% to 99% by varying the Fermi energy level of the graphene from 0â
eV to 0.7â
eV. In the simulation, when the incident angles of TE and TM waves change from 0° to 60°, the average absorption keeps greater than 80%. The proposed absorber shows promising performance, which has potential applications in developing graphene-based terahertz energy harvesting and thermal emission.
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MEDLINE
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En
Ano de publicação:
2021
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Article