On the performance of graphene based plasmonic biosensor with bimetallic combination on 2S2G prism

Surface plasmon resonance (SPR) sensors based on bimetallic combination of silver (Ag) and gold (Au) with grapheme in visible and in near infrared (IR) region of operation are studied. Five-layer sensor's geometry is considered based on Kretschmann configuration having chalcogenide prism as substrate material. Proposed structure shows enhanced detection accuracy and intrinsic sensitivity at near IR wavelength.