Bimetallic Black Phosphorous Based Surface Plasmon Resonance Biosensor with Enhanced Sensitivity

摘要

In the present communication, a highly sensitive optical biosensor based on surface plasmon resonance (SPR) is reported. In this biosensor, we used the hybrid configuration of Bk-7 glass prism/Ag/Au/black phosphorous (BP)/graphene based on Kretschmann configuration to measure the sensitivity by using transfer matrix method (TMM). We analyze reflectance curve with angular interrogation method. The sensitivity of this configuration is 200.25 deg/RIU, detection accuracy 1.87 and quality parameter 46.89/RIU for refractive index change of sensing medium from 1.33 to 1.37. We have analyzed the performance of proposed SPR biosensor at different number of graphene layer.