Open AccessResearch on Perfect and Tunable Metamaterial Absorber Based on Crosshair-shaped Graphene
Author(s) -
Yiran Guo,
Yi Qi,
Chuqin Liu,
Weiming Liu,
Xiangxian Wang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2109/1/012015
Subject(s) - finite difference time domain method , graphene , materials science , molar absorptivity , absorption (acoustics) , surface plasmon resonance , electric field , optics , optoelectronics , ray , metamaterial , metamaterial absorber , relaxation (psychology) , plasmon , nanotechnology , tunable metamaterials , physics , nanoparticle , psychology , social psychology , quantum mechanics
Graphene, as a new nano-material, according to the physical properties of electric field localization and selective absorption on light of surface plasmon resonance (SPR), a tunable, multi-band and wide-angle perfect absorber based on crosshair-shaped graphene is devised by using the Finite Difference in Time Domain (FDTD) method. In this paper, the effects of chemical potential, relaxation time, and incident angle of light on the absorptivity of graphene are systematically discussed. The simulation experiment shows that there are two absorption peaks with perfect absorption rate appeared in the study range, and the maximum modulation index can be obtained by changing the relaxation time. Finally, it proves that the absorber is insensitive to wide-angle of light. Thus, it is able to be concluded that the absorber has a great reference value to sensor, wireless communication, biomedical and other fields.