Design and Analysis of Circular Lattice PCF Biosensor -Based on Surface Plasmon Resonance

We present a model of circular frame photonic crystal fiber (PCF) biosensor and numerically characterizing its performance. The sensor is established on surface plasmon resonance (SPR) that can develop in metal-dielectric area of PCF. The sensor can be utilized to find out different biological substances by measuring the refractive index (RI). This PCFSPR bio-sensor can monitor a RI range of 1.31 to 1.40, which is a respectable range. The role of plasmonic material used in the PCF-SPR in this sensor is performed by gold, which is positioned on the external surface boundary of the fiber structure to facilitate manufacture. The unknown biological sample can be found by introducing it on the outer face of the metal coating. The sensor is quantitatively investigated using the COMSOL Multiphysics, a finite element method-based software. Changes in pick amplitude of loss spectrum and the corresponding wavelength shift are used to investigate sensor performance. The capability study of the sensor shows that the highest wavelength sensitivity is 12100 nm/RIU, the resolution is 8.26x10(-06) RIU, and the highest amplitude sensitivity is 1921 RIU-1, the resolution is 5.21x10(-06) RIU.