A metamaterial absorber with electrically and thermally tunable absorption frequency and absorptivity

被引：0

作者：

HU, Bao-Jing ^{[1
,2
]}

Huang, Ming ^{[2
]}

Zhao, Jin-Yan ^{[1
]}

Yang, Li ^{[3
]}

Yang, Yu-Lin ^{[1
]}

机构：

[1] Yunnan Agr Univ, Coll Sci, Kunming 650201, Peoples R China

[2] Yunnan Univ, Sch Informat Sci & Engn, Kunming 650091, Peoples R China

[3] Yunnan Agr Univ, Coll Big Data, Kunming 650201, Peoples R China

来源：

JOURNAL OF INFRARED AND MILLIMETER WAVES | 2024年 / 43卷 / 02期

基金：

中国国家自然科学基金;

关键词：

absorber; Dirac semimetal; strontium titanate; dual-tunable; PLASMON-INDUCED TRANSPARENCY; BAND TERAHERTZ ABSORBER; DIRAC SEMIMETAL; BROAD-BAND; GRAPHENE; BANDWIDTH;

D O I：

10.11972/j.issn.1001-9014.2024.02.008

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 theoretically 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 modified, providing thus a solid theoretical basis for the design of dual-tunable filters and absorbers.

引用

页码：192 / 199

页数：8

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