A triple plasmon-induced transparency terahertz sensor based on graphene metamaterials

被引：0
|
作者：
Xiang, Junhong [1 ]
Chen, Tao [1 ]
机构：
[1] Guilin Univ Elect Technol, Guangxi Key Lab Automat Detecting Technol & Instru, Guilin 541004, Guangxi, Peoples R China
来源：
DIAMOND AND RELATED MATERIALS | 2024年 / 149卷
基金：
中国国家自然科学基金;
关键词：
Graphene metamaterial; Terahertz; Sensor; Triple plasmon-induced transparency; Polarization-independent;
D O I：
10.1016/j.diamond.2024.111608
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A metamaterial-based terahertz sensor design is presented in this paper. The metamaterial unit structure comprises a graphene cross and three sets of graphene strips, which collectively achieve a triple plasmon-induced transparency (PIT) in both polarization directions. The theoretical results based on the Lorentz resonance theoretical model are in good agreement with finite difference time domain (FDTD) simulations. The sensor is polarization-independent and changes in the angle of incidence between 0 degrees and 10 degrees have a negligible impact on the sensing performance. Furthermore, the sensor exhibits a notable slow-light effect, with a maximum sensitivity of 1.65 THz/RIU and a FOM value of 4.74/RIU for the triple PIT, which is superior to that of comparable devices.
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页数：9
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