钛酸锶
摩尔吸收率
超材料吸收剂
超材料
半金属
材料科学
耦合模理论
钛酸酯
吸收(声学)
极化(电化学)
双模
物理
光电子学
光学
折射率
电子工程
可调谐超材料
化学
带隙
复合材料
物理化学
陶瓷
电介质
工程类
作者
Baojing Hu,Ming Huang,Yang Li,Jinyan Zhao
出处
期刊:Journal of The Optical Society of America B-optical Physics
[Optica Publishing Group]
日期:2023-02-08
卷期号:40 (4): 688-688
被引量:2
摘要
A dual-controlled tunable polarization-independent perfect absorber based on bulk Dirac semimetal (BDS) and strontium titanate (STO) is proposed and analyzed. The results show that the absorptivity can reach 99% at 1.26 THz due to the critical coupling effect. Meanwhile, the absorptivity and resonant frequency of the proposed absorber can be dual-tuned dynamically by varying the temperature of the STO and the Fermi energy of the BDS. Furthermore, the coupled mode theory (CMT) and the equivalent circuit model (ECM) are used to theoretically analyze the performance of the absorber. Finally, modulation of the absorptivity spectra by tailoring the structure dimensions is also discussed. This work provides potential applications in the design of dual-tunable filters and absorbers.
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