基于Fano共振的石墨烯超材料传感特性研究  

Investigation of Sensing Characteristic of Graphene Metamaterial Based on Fano Resonance

作　　者：赵静 王加贤 邱伟彬[2] 赵泽阳 Zhao Jing;Wang Jiaxian;Qiu Weibin;Zhao Zeyang(School of Electronics and Electrical Engineering,Xiamen Institute of Technology,Xiamen,Fujian 361021,China;College of Information Science and Engineering,Huaqiao University,Xiamen,Fujian 361021,China)

机构地区：[1]厦门工学院电子与电气工程学院,福建厦门361021 [2]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《激光与光电子学进展》2021年第5期245-250,共6页Laser & Optoelectronics Progress

基　　金：福建省杰出青年科学基金(2015J06015);福建省中青年教师教育科研项目(JAT190942)。

摘　　要：提出了一种基于Fano共振的太赫兹生物传感器,该传感器由石墨烯微盘三聚体结构组成。使用有限元方法分析了该结构的传输特性。仿真结果表明:石墨烯三聚体结构可以激发Fano共振,该传感器在太赫兹波段的灵敏度可以达到2 THz/RIU,品质因数可达到8;利用石墨烯化学势可以调节谐振峰值,因此在太赫兹波段可实现对谐振峰值的主动调控。该结构为基于超材料的超灵敏太赫兹传感器提供了一种设计思路,在微纳米级厚度的物质传感与探测方面具有潜在的应用价值。A terahertz biosensor based on Fano resonance is proposed.The sensor is composed of a graphene microdisk trimer structure.The finite element method is applied to investigate the transmission characteristics of the structure.Simulation results exhibit that the graphene trimer structure can excite Fano resonance.The structure yields a high sensitivity of 2 THz/RIU and a figure of merit(FOM)of 8 in the THz spectrum;the graphene chemical potential can be used to adjust the resonance peak.The band realizes the active regulation of the resonance peak.This structure provides a design idea for the ultrasensitive terahertz sensor based on metamaterials,and has potential application value in the sensing and detection of materials with micronano thickness.

关 键 词：表面光学 表面等离激元 太赫兹传感器 有限元方法 石墨烯超材料 Fano共振 

分 类 号：O436[机械工程—光学工程]