期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 52, 期 27, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab1892
关键词
terahertz wave; single-band absorber; tunable absorber; graphene microstructures
资金
- National Natural Science Foundation of China [61871355, 61831012]
- Zhejiang Province Natural Science Fund [LY18F010016]
We propose an all-graphene-dielectric tunable terahertz absorber composed of a graphene microstructure layer, a dielectric spacer layer and a metallic ground plane. The absorption performance and internal mechanism of the absorber have been comprehensively analyzed. When E-f changes from 0 eV to 0.6 eV, the absorption peak changes from 0.48 THz to 1.579 THz. In addition, we present a novel equivalent circuit model to analyze the mechanism of the absorber. The numerical calculation results are basically consistent with the result of the equivalent circuit model. Our work provides a reference for the design and theoretical study of all-graphene terahertz devices.
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