Perfect double-layer terahertz absorber based on graphene metamaterial

Using bilayer graphene structures (L-type and disk-type structures), we numerically demonstrate a tunable single-band terahertz metamaterial absorber with nearly perfect (100%) absorption by continuously adjusting the graphene Fermi energy parameters to determine the maximum absorption rate, the cor...

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Bibliographic Details
Main Authors: Haoduo Jia, Xin Tang, Hui Li, Ziwen Qian, Ming Li, Dai Wu, Peng Li, Jianxin Wang, Xinghua Zhu, Dingyu Yang
Format: Article
Language:English
Published: AIP Publishing LLC 2022-08-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/5.0099346
Description
Summary:Using bilayer graphene structures (L-type and disk-type structures), we numerically demonstrate a tunable single-band terahertz metamaterial absorber with nearly perfect (100%) absorption by continuously adjusting the graphene Fermi energy parameters to determine the maximum absorption rate, the corresponding center frequency, and bandwidth. Graphene distinct dielectric–metal transition properties make it possible to achieve tunable terahertz absorption. The maximum absorption rate increases from 18% to 100% when the Fermi energy is increased from 0.1 to 1 eV. At 1 eV, the absorption rate exceeds 90% in the range of 0.57–1.03 THz. The incident angle is also tested. When the angle is in the range of 60°, excellent adsorption performance is maintained.
ISSN:2158-3226