Abstract

A graphene-based surface plasmon resonance sensor using D-shaped fiber in anti-crossing has been designed. Silver as a plasmon active metal is followed by graphene, which helps in preventing oxidation and shows better adsorption efficiency to biomolecules. A wavelength interrogation technique based on the finite element method has been used to evaluate performance parameters. Design parameters such as thickness of silver, residual cladding, and ${\mathrm{GeO}}_2$ dopant concentration have been optimized. The wavelength sensitivity is found to be $6800\mathrm{nm}/\mathrm{RIU}$ and resolution of $8.05\times {10}^{-5}\mathrm{RIU}$. We believe that usage of graphene on silver may open a new window for study of online biomolecular interaction.

© 2017 Optical Society of America

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