LAUSR

AbstractIn this paper, we demonstrate gold-black phosphorus (Au-BP) based surface plasmon resonance (SPR) biosensor. The unique electronic and optical properties of black phosphorous like direct band gap, smaller work function, high charge carrier mobility, and better binding of molecules on sensor surface are utilized. The thickness of gold layer is optimized at 633 nm wavelength to achieve best possible sensing performance parameter i.e. sensitivity and detection accuracy. Further, silicon layer is used to enhance the detection accuracy. The performance of the proposed biosensor with and without using silicon layers are compared with conventional and graphene based biosensor. Finally, it is observed that the higher sensitivity of proposed SPR biosensor is about 1.42 times of the conventional and 1.40 times graphene based SPR biosensor.