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  • Title: High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator.
    Author: Xiao G, Xu Y, Yang H, Ou Z, Chen J, Li H, Liu X, Zeng L, Li J.
    Journal: Sensors (Basel); 2021 Feb 07; 21(4):. PubMed ID: 33562255.
    Abstract:
    Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.
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