石墨烯
太赫兹辐射
超材料
等离子体子
材料科学
光电子学
光学
费米能级
极化(电化学)
电磁感应透明
纳米技术
物理
化学
量子力学
电子
物理化学
作者
Juncheng Wang,Shan Tu,Tao Chen
标识
DOI:10.1016/j.physe.2023.115829
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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