谐振器
功勋
诺共振
灵敏度(控制系统)
材料科学
折射率
共振(粒子物理)
光学
透射率
激发态
波导管
联轴节(管道)
光电子学
物理
等离子体子
电子工程
原子物理学
工程类
冶金
作者
Tianshan Chen,Jiayao Gao,Xiangxian Wang,Yizhen Chen,Hua Yang,Yunping Qi
标识
DOI:10.1088/1402-4896/ad9bf6
摘要
Abstract A baffled metal-insulator-metal (MIM) waveguide coupled with an L-shaped resonator was developed and a double Fano resonance was excited in the structure. Using the optimal parameters, the sensing characteristics of the structure in a gas environment were studied. The maximum sensitivity was 682 nm/RIU and the maximum figure of merit (FOM) was 7587. Based on this structure, the influence of the resonators on the transmittance characteristics was studied for four different placement ways. A triple Fano resonance was obtained by simply inverting the L-shaped resonator. In this state, the maximum sensitivity and FOM reached 945 nm/RIU and 1.04×105, respectively. Compared with the L-shaped resonator structure, the sensitivity and FOM of the inverted L-shaped resonator structure were significantly improved. This study provides a new concept for designing a refractive-index sensor with high sensitivity, high FOM , and multichannel sensing.
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