Graphene-based metasurface sensing applications in terahertz band

被引：122
作者：
He, Zhihui [1 ,2 ]
Li, Lingqiao [1 ,2 ]
Ma, Huqiang [3 ]
Pu, Lihui [1 ,2 ]
Xu, Hui [4 ]
Yi, Zao [5 ]
Cao, Xinliang [1 ,2 ]
Cui, Wei [1 ,2 ]
机构：
[1] Yanan Univ, Sch Phys & Elect Informat, Yanan 716000, Peoples R China
[2] Shaanxi Key Lab Intelligent Proc Big Energy Data, Yanan 716000, Peoples R China
[3] Xian Thermal Power Res Inst Co Ltd, Xian 710054, Peoples R China
[4] Hunan Univ Technol & Business, Sch Math & Stat, Changsha 410205, Peoples R China
[5] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Sichuan, Peoples R China
来源：
RESULTS IN PHYSICS | 2021年 / 21卷
基金：
中国国家自然科学基金;
关键词：
Plasmon-induced transparency; Ultra-high sensitivity; Terahertz sensor;
D O I：
10.1016/j.rinp.2020.103795
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultra-high sensitivity sensor has significant application for micro-nano optical devices in terahertz. Here, we propose a simple graphene metasurface, which can achieve obvious graphene plasmon-induced transparency (PIT) phenomenon. We can find that PIT, reflectivity, and absorbance can be effectively tuned by the Fermi level. Moreover, the finite-different time-domain (FDTD) numerical results are well agreement with the coupled mode theory (CMT) results. Interestingly, an ultra-high sensitivity sensor performance based on tunable PIT in terahertz bands can be realized in our proposed metasurface, the sensitivity and Figure of merit (FOM) can reach up to 1.7745 THz/RIU and 23.61, respectively. Hence, these results can provide theoretical guidance for terahertz dynamic integrated photonic devices.
引用
收藏
页数：7
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