Sensitivity Enhancement of a Surface Plasmon Resonance Sensor with Platinum Diselenide

The extraordinary optoelectronic properties of platinum diselenide (PtSe2), whose structure is similar to graphene and phosphorene, has attracted great attention in new rapidly developed two-dimensional (2D) materials beyond the other 2D material family members. We have investigated the surface plasmon resonance (SPR) sensors through PtSe2 with the transfer matrix method. The simulation results show that the anticipated PtSe2 biochemical sensors have the ability to detect analytic. It is evident that only the sensitivities of Ag or Au film biochemical sensors were observed at 118 degrees/RIU (refractive index unit) and 130 degrees/RIU, whereas the sensitivities of the PtSe2-based biochemical sensors reached as high as 162 degrees/RIU (Ag film) and 165 degrees/RIU (Au film). The diverse biosensor sensitivities with PtSe2 suggest that this kind of 2D material can adapt SPR sensor properties.