红外与毫米波学报2024，Vol.43Issue(2)：192-199,8.DOI:10.11972/j.issn.1001-9014.2024.02.008
吸收率和吸收频率大小电热可调的超材料吸波体
A metamaterial absorber with electrically and thermally tunable absorption frequency and absorptivity
摘要
Abstract
A dual-tunable"perfect"metamaterial absorber composed of a"Tian-zi"-shaped bulk Dirac semimetal(BDS)resonator and strontium titanate(STO)is proposed in this work and systematically studied by performing numerical simulations.From the acquired results,it is demonstrated that the absorber can achieve 99%absorption rate at 2.613 1 THz when the BDS Fermi energy is 40 meV and the STO temperature is 400 K.Moreover,both dynamics dual-tuning of the absorption frequency and absorption rate of the absorber can be successfully achieved by varying the BDS Fermi energy level and the STO temperature.Additionally,the absorber's performance is the-oretically analyzed using both coupled mode theory(CMT)and equivalent circuit model(ECM).Finally,the changes in the absorber's absorption spectrum are further discussed when each parameter of the model is modi-fied,providing thus a solid theoretical basis for the design of dual-tunable filters and absorbers.关键词
吸波体/狄拉克半金属/钛酸锶/双调谐Key words
absorber/Dirac semimetal/strontium titanate/dual-tunable分类
通用工业技术引用本文复制引用
胡宝晶,黄铭,赵金燕,杨利,杨玉林..吸收率和吸收频率大小电热可调的超材料吸波体[J].红外与毫米波学报,2024,43(2):192-199,8.基金项目
Supported by the National Natural Science Foundation of China(NSFC)(61461052,11564044,and 61863035),Yunnan Provincial Department of Science and Technology Agricultural Joint Special Project(202101BD070001-064)and Yunnan Province Basic Research Project(202301AT070495) （NSFC）
