Laser & Optoelectronics Progress, Volume. 58, Issue 5, 0524001(2021)
Investigation of Sensing Characteristic of Graphene Metamaterial Based on Fano Resonance
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.
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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
Category: Optics at Surfaces
Received: Jul. 2, 2020
Accepted: Aug. 3, 2020
Published Online: Apr. 19, 2021
The Author Email: Wang Jiaxian (wangjx@hqu.edu.cn)