首页|吸收率和吸收频率大小电热可调的超材料吸波体

吸收率和吸收频率大小电热可调的超材料吸波体

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提出了由"田"字型狄拉克半金属(BDS)谐振器和钛酸锶(STO)组成的双调谐"完美"超材料吸波体并进行数值仿真.结果表明:当BDS费米能量为40 meV、STO温度为400 K时,吸波体在2.613 1 THz处吸收率达到了99%.同时,当BDS费米能量和STO温度改变时,可实现吸波体吸收频率和吸收率大小的动态双调谐.此外,分别利用了耦合模理论(CMT)和等效电路模型(ECM)从理论上分析了吸波体的性能.最后,进一步讨论了模型各参数改变时,吸波体吸收光谱的变化规律.这为双调谐滤波器、吸波体的设计提供了理论依据.
A metamaterial absorber with electrically and thermally tunable absorption frequency and absorptivity
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.

absorberDirac semimetalstrontium titanatedual-tunable

胡宝晶、黄铭、赵金燕、杨利、杨玉林

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云南农业大学 理学院,云南 昆明 650201

云南大学 信息学院,云南 昆明 650091

云南农业大学 大数据学院(信息工程学院),云南 昆明 650201

吸波体 狄拉克半金属 钛酸锶 双调谐

National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)Yunnan Provincial Department of Science and Technology Agricultural Joint Special ProjectYunnan Province Basic Research Project

614610521156404461863035202101BD070001-064202301AT070495

2024

10.11972/j.issn.1001-9014.2024.02.008

红外与毫米波学报
中国光学学会 中国科学院上海技术物理所

红外与毫米波学报

CSTPCD北大核心
影响因子：0.612
ISSN：1001-9014
年,卷(期)：2024.43(2)
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