Au Coated Photonic Crystal Fiber based Surface Plasmon Resonance Sensor: Design and Investigation

We propose in this research an idiosyncratic, shallow to erect, and highly perceiving Plasmonic material-coated photonic crystal fiber (PCF) based micro-structured biosensor. Our precedence has a cardinal pattern of circular air holes inside the fiber, which leads to a superior sensing performance. The evaluation of all the sensor characteristics has been expelled by sustaining the finite element method (FEM) of COMSOL Multiphysics. The gold (Au) layer just around the fiber acts as the plasmonic material. Gold is picked out due to its high stable rate and maximum resonance peak value in the sensing environment. After the swelling of all the fiber parameters, we derived a maximum amplitude sensitivity (AS) and wavelength sensitivity (WS) of 114 RIU − 1 and 20000 nm/RIU, respectively, with a maximum sensor resolution of 1.15×10 − 9 for wavelength. The overall analyte sensing range is from refractive indices 1.36 to 1.4. With its enhanced performance in terms of sensitivity, we believe that this Plasmonic material-coated PCF biosensor can potentially contribute to the detection of unknown analytes.