▎ 摘 要
We designed a novel perovskite plasmonic nanolaser based on a semiconductor-graphene-insulator-metal (SGIM) structure in the visible region, and the graphene is placed between an inorganic CsPbBr3 nanowire and a semi-circular silver ridge substrate deposited with silicon dioxide (SiO2). Based on the finite element method, the influences of the graphene thickness and CsPbBr3 nanowire radius on the mode characteristics and electric field distribution of the hybrid plasmonic waveguide were investigated. We obtained the optimal structure parameter of the hybrid plasmonic waveguide, which could achieve a low gain threshold of 0.72 mu m(-1) in the visible region. Furthermore, compared to a gold or copper bridge substrate, the plasmonic waveguide based on the sliver bridge substrate exhibited a smaller propagation loss and larger propagation distance, leading to a lower gain threshold. This work provides us a novel method for developing applications of nanolasers in the visible region.