Design and Performance Analysis of a Novel Hoop-Cut SPR-PCF Sensor for High Sensitivity and Broad Range Sensing Applications

This article presents a systematic numerical investigation of a surface plasmon resonance (SPR) sensor based on photonic crystal fiber (PCF). The proposed design is modeled and simulated using the full-vectorial finite-element (FV-FEM) technique and sensing characteristics, such as confinement loss (CL) behaviors, phase matching, and sensitivity, which are investigated and presented. The plasmonic layer is made up of TiO2 and gold for improved sensitivity. The reported sensor exhibits an amplitude sensitivity of −374.062 RIU−1 and a wavelength sensitivity of 2000 nm/RIU for the refractive index (RI) sensing range of (1.39–1.44), according to the loss spectrum shift. The reported hoop-cut PCF-based SPR (HPCF-SPR) sensor is suitable for biosensing and chemical sensing applications because of its broad range (1.39–1.44) of analyte detection.