吸收率和吸收频率大小电热可调的超材料吸波体
DOI:
作者:
作者单位:

云南农业大学

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(61461052, 11564044, 61863035);云南省科技厅农业联合专项(202101BD070001-064);云南省基础研究专项(202301AT070495)


A metamaterial absorber with electrically and thermally tunable absorption frequency and absorptivity
Author:
Affiliation:

Yunnan agricultural university

Fund Project:

National Natural Science Foundation of China (NSFC) (Grant Nos. 61461052, 11564044, and 61863035). Yunnan Provincial Department of Science and Technology Agricultural Joint Special Project(Grant Nos. 202101BD070001-064) and Yunnan Province Basic Research Project(Grant Nos. 202301AT070495)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    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2.6131 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。

    Abstract:

    A dual-tunable "perfect" metamaterial absorber composed of a "Tian-zi"-shaped 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 2.6131 THz when the BDS Fermi energy is 40 meV and the STO temperature is 400 K. Moreover, both dynamic 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 the 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.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-06-25
  • 最后修改日期:2023-07-29
  • 录用日期:2023-08-10
  • 在线发布日期:
  • 出版日期: