Photonic Crystal Fiber Refractive Index Sensor based on Surface Plasmon Resonance

In this paper we propose a very highly sensitive photonic crystal fiber (PCF) based refractive index (RI) sensor with a Nano film of gold which is externally coated. To avoid any reflection of radiation power, the utmost layer is circled with perfect match layer (PML). Finite element method (FEM) based numerical outcome shows that the proposed sensor has a maximum amplitude sensitivity of1052 per refractive index unit $(\mathrm{R}\mathrm{I}\mathrm{U}^{-1})$ and maximum wavelength sensitivity of 24,000 nanometer per refractive index (nm/RIU) in the basis of y polarization mode with the variation of wide refractive index range from 1.33 to 1.42. Therefore, this proposed sensor can be implemented for unknown analyte and chemical detection.