▎ 摘　　要

We propose, to the best of our knowledge, a new configuration of a biosensor based on the graphene-MoS2 hybrid structure by adopting the lower refractive index MgF2 prism in order to improve the sensitivity and the figure of merit (FOM). We can obtain an ultrasensitive sensor with values of sensitivity and FOM as high as 540.8 degrees/RIU and 145/RIU, respectively, by modulating the parameters in the configuration and comparatively choosing a different absentee layer material. The proposed structure is applicable in the realization of an integrated device for the surface plasmon resonance biosensor. (C) 2018 Optical Society of America.