title: Fano Resonance Based on Metal-Insulator-Metal Waveguide-Coupled Double Rectangular Cavities for Plasmonic Nanosensors.
abstract: A refractive index sensor based on metal-insulator-metal (MIM) waveguides coupled double rectangular cavities is proposed and investigated numerically using the finite element method (FEM). The transmission properties and refractive index sensitivity of various configurations of the sensor are systematically investigated. An asymmetric Fano resonance lineshape is observed in the transmission spectra of the sensor, which is induced by the interference between a broad resonance mode in one rectangular and a narrow one in the other. The effect of various structural parameters on the Fano resonance and the refractive index sensitivity of the system based on Fano resonance is investigated. The proposed plasmonic refractive index sensor shows a maximum sensitivity of 596 nm/RIU.
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. zdzhang@nuc.edu.cn.|Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Eduction, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. zdzhang@nuc.edu.cn.
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. 15135165573@163.com.|Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Eduction, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. 15135165573@163.com.
authors.forename: Liang
authors.initials: L
authors.lastname: Luo
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. xuechenyang@nuc.edu.cn.|Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Eduction, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. xuechenyang@nuc.edu.cn.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Xue
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. wdzhang@nuc.edu.cn.|Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Eduction, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. wdzhang@nuc.edu.cn.
authors.forename: Wendong
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. shubin_yan@nuc.edu.cn.|Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Eduction, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China. shubin_yan@nuc.edu.cn.
authors.forename: Shubin
authors.initials: S
authors.lastname: Yan
keywords: Fano resonance; finite element method; metal-insulator-metal waveguide; refractive index sensor; surface plasmon polaritons