Optimum Design of Tapered Fiber Optic Surface Plasmon Resonance (SPR) Biosensor Probe With Different Metal Choices

Abstract

In this article, an optical fiber tapered surface plasmon resonance (SPR) biosensor probe has been analyzed in the context of different metal choices viz., Au, Cu, Al, Ag, Pt, Ni, and Co. The effect of different metal selection on sensitivity, the full width at half maximum (F.W.H.M.), and detection accuracy (D.A.) have been analyzed while varying the taper ratio (T.R.). T.R. can play a significant role in shifting the SPR dip near the visible or infrared band, and also the effect of metal choices greatly tailored the SPR dip for the same T.R. In the proposed work, very basic geometry is considered to understand the role of different metals in designing optimum performance SPR biosensor chip. The application of the proposed work is analyzed in the context of biosensor application.