Wagon wheel Fiber based Surface Plasmon Resonance Biosensors with bimetallic spatially deposited metal layers

In this paper, Multi-channel wagon wheel fiber (WWF) based Surface Plasmon Resonance (SPR) bio-sensor with spatially deposited metal layers is analysed. Two spatially deposited bimetallic layers are used as plasmonic material for two different analytes which will create two distinct SPRs corresponds to each metal layer. Metals are used in such a way that SPRs have been generated for two distinct polarized lights. A center hole is created to increase the resonant interaction between core mode and plasmonic mode. X-pol light interacts with Ag metal layers while y-pol light interacts with Au metal layers. This sensor provides multi-analyte sensing with the help of two different polarized modes with two spatially distributed metal layers. Good performance parameters are also achieved for both plasmonic peaks.