Design of a high-performance graphene/SiO-Ag periodic grating/MoS surface plasmon resonance sensor.

This study optimizes a surface plasmon resonance (SPR) sensor based on - periodic grating using graphene and a hybrid structure to enhance sensitivity. The sensing performance was analyzed by wavelength modulation. By optimizing the structural parameters, we can obtain the quality factor and sensitivity of 90.192 and 960⋅. The periodic grating surface covered with prevents the oxidation of the silver layer and increases the adsorption of biomolecules. Compared with the conventional silver grating SPR sensor, the sensor's sensitivity and quality factor can be significantly enhanced. Experiments were carried out using sucrose solutions with different refractive indices, and the results indicate there was a good linear relationship between the resonance wavelength and the sucrose solution. The sensor has vast potential for practical applications.