Double Core PCF Sensor with Au-HfO2 Hybrid layer Based on SPR

Abstract

          Double core photonic sensor design based on surface plasmon resonance (SPR) that is the base of A photonic crystal fiber  sensor is designed with a hexagonal structure that employs a hybrid material design incorporating Au and HfO2 Layer. The latter is considered as active plasmonic material at which SPR is rapidly excited. COMSOL Multiphysics software is used to design and analysis the obtained data for suggested sensor. Finite element method (FEM) that is a full-wave numerical technique is carried out to obtain the approximate solutions for electromagnetic boundary value problems The proposed sensor   has a detection range from  which optimize in spectrum range from  to   . The sensitivity (S_λ) has a large value at  that associated with the highest sensor resolution of   .  The trending data of resonance wavelength peak ( ) and peak loss exhibit non-linearly increased.  Concerning on FWHM, the findings show that the non-linearity tendency is dominant; it increases rapidly with RIs of analyte. lastly, figure of merit ( ) has larger value at maximum  )  where the highest values of FOM attains maximum values of  . Fine-tuning air hole diameter, core size, layer thickness dimensions of the fiber to achieve good performance of proposed sensor. Leveraging the unique optical properties of HfO2 and Au, the sensor demonstrates superior performance metrics, achieving confinement.