Open AccessTunable polarization-independent and angle-insensitive broadband terahertz absorber with graphene metamaterials
Author(s) -
He Feng,
Zixuan Xu,
Kai Li,
Mei Wang,
Wanli Xie,
Qingpeng Luo,
Bingyu Chen,
Weijin Kong,
Maojin Yun
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.418865
Subject(s) - terahertz radiation , metamaterial absorber , graphene , materials science , metamaterial , optics , surface plasmon polariton , optoelectronics , polarization (electrochemistry) , absorption (acoustics) , broadband , fermi energy , brewster's angle , plasmon , surface plasmon , tunable metamaterials , physics , nanotechnology , chemistry , quantum mechanics , brewster , electron
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 0 eV to 0.7 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.