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.
作者
赵静
王加贤
邱伟彬
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)
出处
《激光与光电子学进展》
CSCD
北大核心
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)。
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
optics at surfaces
surface plasmonic polariton
terahertz sensor
finite element method
graphene metamaterial
Fano resonance
