Abstract:

CsPbBr₃, an all-inorganic perovskite, has emerged as a popular material in the photoelectric field because of its excellent photoelectric characteristics. This study focuses on the CsPbBr₃ structure, containing submicron spherical cavities, revealing the microscale interactions between photons and excitons. By analyzing the photoluminescence spectra, radiation lifetime, and polarization evolution law at different excitation powers, it was discovered that the CsPbBr₃ microsphere cavity achieved high circular polarization lasing above the lasing threshold. Time-resolved spectroscopy was used to analyze the temporal polarization characteristics of CsPbBr₃ submicron spheres in detail during the radiation process, and the lasing peak exhibits a degree of circular polarization as high as 0.65. These results provided a foundation for the design and development of new photoelectric devices using chiral quantum optics.

Key words: CsPbBr₃, photoluminescence, polarization dynamics, micro-nano laser, circularly polarized light