激光与光电子学进展, 2021, 58 (5): 0524001, 网络出版: 2021-04-19
基于Fano共振的石墨烯超材料传感特性研究 
下载： 925次
Investigation of Sensing Characteristic of Graphene Metamaterial Based on Fano Resonance
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
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。
Abstract
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 ultra-sensitive terahertz sensor based on metamaterials， and has potential application value in the sensing and detection of materials with micro-nano thickness.
赵静, 王加贤, 邱伟彬, 赵泽阳. 基于Fano共振的石墨烯超材料传感特性研究[J]. 激光与光电子学进展, 2021, 58(5): 0524001. Jing Zhao, Jiaxian Wang, Weibin Qiu, Zeyang Zhao. Investigation of Sensing Characteristic of Graphene Metamaterial Based on Fano Resonance[J]. Laser & Optoelectronics Progress, 2021, 58(5): 0524001.
PDF全文
