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°/RIU (refractive index unit) and 130°/RIU, whereas the sensitivities of the PtSe₂-based biochemical sensors reached as high as 162°/RIU (Ag film) and 165°/RIU (Au film). The diverse biosensor sensitivities with PtSe₂ suggest that this kind of 2D material can adapt SPR sensor properties.