The influence of single layer MoS₂flake on the propagated surface plasmons of silver nanowire

We demonstrate enhancing the excitation and transmission efficiency of the propagated surface plasmon (SP) of an Ag nanowire (Ag NW) in hybrid Ag-MoS₂structures by contrasting the SP propagation of the Ag NW on different substrates, including SiO₂and monolayer MoS₂, or partially overlapping the Ag NW on MoS₂flakes. The simulation results show that the leaky radiation of the hybrid plasmonic modes H₁and H₂can be prominently suppressed due to the high refractive index dielectric layer of MoS₂, which provides an optical barrier for blocking the leaky radiation, resulting in reduced propagation loss. This paper provides a feasible and effective method to improve the SP propagation length.