DESIGN AND ANALYSIS OF PHOTONIC CRYSTAL FIBER BASED BIO-CHEMICAL SENSORS

Abstract

This work proposes highly sensitive Photonic Crystal Fiber based terahertz sensors for bio chemical sensing applications. The proposed sensors function as refractive index sensors, capable of detecting changes in refractive index with exceptional sensitivity. All the fibers are simulated computationally on Finite Element Method (FEM) based COMSOL Multiphysics software. In this research work we have designed rectangular core PCF with rectangular air holes and Zeonex as background material, working in terahertz frequency range. Various performance parameters were numerically analysed such as relative sensitivity, confinement loss, effective mode index, effective mode area, non-linearity, and birefringence. With the proposed designs high relative sensitivity, low confinement loss, and high birefringence have been reported around the frequency range of 0.5 THz to 1.5 THz. The high sensitivity values suggest that proposed design has significant potential for detecting various types of cancer cells, blood components detection, malaria detection and many other types of biomolecules detection. Additionally, various fabrication processes are suggested to enable the production of these fibers for real-world applications.