A terahertz sensor based on graphene metamaterial with tunable double plasmon-induced transparency

被引：6
作者：
Wang, Juncheng [1 ]
Tu, Shan [1 ,2 ]
Chen, Tao [1 ]
机构：
[1] Guilin Univ Elect Technol, Guangxi Key Lab Automat Detecting Technol & Instru, Guilin 541004, Guangxi, Peoples R China
[2] Guangxi Normal Univ, Guangxi Key Lab Nucl Phys & Technol, Guilin 541004, Guangxi, Peoples R China
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2024年 / 155卷
基金：
中国国家自然科学基金;
关键词：
Graphene metamaterial; Terahertz; Sensor; Tunable plasmon-induced transparency; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; SLOW LIGHT; INDEX; ANALOG; ABSORBER; LAYER;
D O I：
10.1016/j.physe.2023.115829
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A terahertz sensor based on graphene metamaterial with double plasmon-induced transparency is proposed, which mainly consists of four graphene elliptical rings and four graphene rectangular strips. The theoretical spectra of the three-resonant oscillator model fit well with the transmission spectra. A double PIT window is formed by the coupling between the bright mode and two quasi-dark modes, and the dynamic tunability of graphene can be used to control the frequency shift and the switch of the double PIT phenomenon. The number of windows can be adjusted by changing the size and Fermi level of different structures. The sensor is unaffected by polarization angle changes. The maximum sensitivity and FOM of the PIT window are 1.50 THz/RIU and 6.89/RIU. In addition, the sensor has a good slow light effect. This terahertz sensor can be used in complex experimental environments due to its flexible tunability.
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页数：11
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