Surface plasmon resonance fiber optical sensor based on Photonic Crystal and graphene

In this paper, a theoretical analysis of figure of merit (FOM) of a surface plasmon resonance (SPR) sensor with a one dimensional (1D) Photonic Crystal (PC)and an anti-oxidizing layer of the graphene has been carried out. The numerical simulation is based on side polished multi mode fiber SPR sensor with the 75 μm residual fiber thickness and 20nm silver film thickness. Meanwhile, the comparisons for traditional SPR sensor and SPR sensor with only one anti-oxidizing layer have also been studied. The studies show that the SPR sensor with PC structure and graphene layer has higher FOM than other SPR sensors mentioned. This design is expected to be a better choice on chemical and biological sensing.