吉首大学学报（自然科学版）2023，Vol.44Issue(6)：37-43,7.DOI:10.13438/j.cnki.jdzk.2023.06.007
石墨烯可调谐双频完美吸收器设计
Tunable Dual-Frequency Perfect Absorber with Graphene
摘要
Abstract
A tunable dual-frequency perfect absorber consisting of a graphene resonator,a SiO2 dielectric layer and a metal reflector layer has been designed by utilizing the excellent tunable optical properties of graphene.The effects of graphene chemical potential,polarization angle and size on the absorber absorp-tion performance were systematically investigated,and the electric field pattern at the resonance frequen-cy was analyzed to further explain the principle of absorber absorption.The results show that the absorb-er has an absorption rate of 99.98％and 99.99％at 6.363 and 8.987,respectively.The absorption peak position of the absorber can be effectively adjusted by changing the chemical potential of graphene,and the peak absorption rate can reach more than the peak absorption rate at any polarization angle in the range of 0°～80°.The thickness of the SiO2 dielectric layer has almost no effect on the resonance peak po-sition of this absorber,but it has some effect on the peak absorption rate,which increases and then de-creases with the gradual increase of the thickness,and perfect absorption is achieved near the thickness of 3.1 µm.The high absorption rate of this absorber stems mainly from the electromagnetic resonance effect.关键词
超材料/太赫兹/石墨烯/双频窄带吸收器Key words
metamaterials/terahertz/graphene/dual-band absorber分类
物理学引用本文复制引用
赵金云,单馨雨,高广波,黄勇刚..石墨烯可调谐双频完美吸收器设计[J].吉首大学学报（自然科学版）,2023,44(6):37-43,7.基金项目
国家自然科学基金资助项目(11964010,11464013,11464014) （11964010,11464013,11464014）
湖南省自然科学基金资助项目(2020JJ4495) （2020JJ4495）
湖南省教育厅重点项目(21A0333) （21A0333）
湖南省研究生创新项目(CX20221126) （CX20221126）
