Abstract
Whispering gallery mode (WGM) lasers have shown great potential for developing highly integrated on-chip light sources. The total internal reflection of the optical mode along the circumference of the nanostructure could provide high-quality factors and small mode volumes for miniaturized coherent lasers. Lead halide perovskites have generated enormous excitement in laser application driven by their excellent photoelectric properties. This chapter provides an overview of the status and prospects of WGM lasers by using lead halide perovskites. First, the fundamental crystal and optical characteristics of lead halide perovskites related to the light emission are presented. Then, the advances and current status in intrinsic and external perovskite WGM lasers are further comprehensively discussed. Finally, the future challenges and outlook toward the development of high-performance perovskite lasers are given.
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