Comparison of the Goos-Hanchen Shift Induced by Surface Plasmon Resonance in Metal-MoSe2-Graphene Structure

The surface plasmon resonance (SPR) based on the two-dimensional (2D) materials is proposed to enhance the Goos-Hanchen (GH) shift. In MoSe2-graphene-coated heterostructure with different metals (Ag/Cu/Au), the GH shift is significantly enhanced. In order to realize high GHshift, the number of MoSe(2)and graphene layer are optimized. Through comparative analysis, by using Ag as the metal, the best GH shift up to 434.7 lambda can be achieved with the MoSe(2)and graphene monolayer. TheoptimumGH shifts of Au/Cu-MoSe2-graphene structures are 360.7 lambda and 190.1 lambda, respectively. Therefore,the highest GH shift corresponding to the sensitivity of 6.600 x 10(5)lambda/RIU is obtained by Ag-MoSe2-graphene structures. Moreover,the sensitivity of Au-MoSe2-graphene structures is 5.815 x 10(5)lambda/RIU,which is about 1000 times higher than the Au, Au-graphene, and Au-MoSe(2)structure. The GH shift sensor with 2D-materialsan be extensive used in the fields of biological researches, optical sensing, and measurement.