A Photonic Crystal Fiber Based Surface Plasmon Resonance Biosensor with Elliptical and Circular Holes

摘要

In this paper, we have numerically investigated a surface plasmon resonance biosensor based on photonic crystal fiber. The proposed structure consists of three circular and four elliptical holes and a gold layer is used as plasmonic material situated, outside the fiber structure. Finite element method (FEM) is applied to evaluate the performance of the structure. Amongst the influential parameters on the performance of this type of biosensor, are the thickness of the gold layer and the diameter of the central hole, and consequently their effects on the sensitivity of the proposed biosensor are fully examined. Using the wavelength interrogation mode, both the maximum sensitivity and the resolution of the proposed device are computed to be respectively, 11003.3 nm/RIU and 9.8 x 10(-6) RIU.