부산대학교 도서관

Aiming to investigate the graphene usage in optical fiber surface plasmon resonance sensor probes, a theoretical analysis of sensitivity, reflectance, normalized transmitted power and figure of merit (FOM) for different configurations have been developed. Here, some noble metals, such as gold (Au), silver (Ag), and copper (Cu), have been used as part of the sensing region. Considering aqueous solutions as analytes, the deposition of graphene layers over the metallic layer has improved the sensor probes performance. Three graphene-optimized probes have been proposed, one for each metal. The configuration Cu-graphene coated probe is the most sensitive with a sensitivity of 6,241 nm/RIU, representing more than two times for a Cu-based probe. On the other hand, the Ag-graphene coated probe presents the maximum FOM of 75.523 RIU −1 . The deposition of graphene layers over Au-coated probes causes an increase in the sensitivity from 2,581 nm/RIU to 4,201 nm/RIU.