In this paper, a new plasmonic photonic crystal fiber (PPCF) to use as sensor for different analyte was designed. The finite element method (FEM) by COMSOL environment was used to investigate the properties and sensing performance numerically. The sensor is made from photonic crystal fiber surrounded by a layer of noble metal. The effect on the outer surface of the PCF of various selective noble metals (gold, silver and copper) used to efficiently generate surface plasmon resonance (SPR) has been studied. A high wavelength sensitivity with a limit of was achieved for different refractive index of analyte. The simulation results indicate that closing holes to the center of the sensor have high influence on the sensitivity of the refractive index, where the wavelength sensitivity and the peaks values in the behavior of the losses curves were increased. For all tests, the relation of wavelength of resonant with the refractive index of analyte was linear, meaning that the sensor could be used for a wider range of refractive index of analyte. Realized amplitude sensitivity reaches 300RIU1 at h  5.5m. Using the same value of h will make the wavelength sensitivity in presence of gold better than the other elements, while the presence of copper is the best in term of amplitude sensitivity.

Photonic Crystal Fibers, Surface Plasmon Resonance, Sensors, Sensitivity.