Theoretical Design of Plasmonic Refractive Index Sensor Based on the Fixed Band Detection

In this paper, we theoretically and numerically reported a simple plasmonic sensor design for the accurate detection of refractive index (RI). The sensing property was characterized by a derived theoretical model, which demonstrated the accurate sensing by measuring the intensity of a fixed narrow passband. It was found that the coupling phase modulation caused by the analyte was the main mechanis...