| Micro laser has a wide application prospect in biosensor,integrated optics,quantum information technology,aerospace and other fields.The laser based on surface plasmon polariton（SPP）effect can confine the light field to deep subwavelength,and then break the diffraction limit to achieve the miniaturization of laser.The new perovskite material can compensate for the ohmic loss caused by metal in SPP laser due to its long diffusion length,high charge mobility and high optical gain,making it a perfect gain medium in SPP laser and contributing to the formation of miniaturized,low-threshold laser.In recent years,SPP lasers with metal-insulate-semiconductor（MIS）structure with perovskite as gain medium have been reported a lot,but these studies only explore the threshold value,quality factor Q and other properties of the laser.The characteristics of SPP laser are not analyzed in principle.In this thesis,the mode distribution in the photon laser and SPP laser is explored through simulation and comparative analysis.Then,the relationship between the thickness of the insulation layer and the performance of the SPP laser is explored according to Maxwell’s equations.The specific research content is divided into two parts:（1）Mode analysis.In this thesis,it is shown that the SPP laser can confine the light field to a few nanometers thin insulation layer by comparing the pattern distribution in the photonic structure laser and the SPP laser,which is beneficial to break through the diffraction limit and realize the miniaturization of the laser.（2）The effect of SiO2 thickness on the performance of MIS laser.In this paper,according to Maxwell’s equations,the cutoff thickness of Si O2 in metal-insulating-semiconductor structure is 12.984 nm,and the Q value of its fundamental mode can reach 8.8592×106,which is significantly higher than that of other structure lasers. |
