Highly Sensitive Multichannel Fano Resonance-Based Plasmonic Sensor for Refractive Index and Temperature Sensing Application

We propose a susceptible multichannel plasmonic sensor for sensing refractive index (RI) and temperature media working in the visible to near-infrared range. The proposed structure’s resonator consists of an elliptical-shaped ring with two stubs at sides four metal nanorods side-coupled separated metal–insulator–metal waveguides. optical responses structure, including transmittance spectra magnetic electric field distributions, are investigated using finite element method (FEM) obtain optimal structural parameters. designed structure supports five channels Fano resonance modes because interaction between narrowband mode broadband MIM WGs. maximum sensitivity values can reach 4500 nm/RIU RI sensing, get 1.00 nm/°C. device exhibits excellent performance could pave way devices significantly higher sensitivity.