Recent Advances in Organic Whispering‐Gallery Mode Lasers

Abstract Organic whispering‐gallery mode lasers (OWGMLs), taking the advantages of organic materials and whispering‐gallery mode (WGM) cavity, have undergone tremendous development with extensive application prospects in advanced optical fields. OWGMLs can be achieved via various strategies, typically including dope organic gain materials into WGM cavities, such as droplets, self‐assembled microcavities, and metal–organic frameworks, and utilize the self‐assembled amorphous or single‐crystalline structures of organic materials to serve simultaneously as the WGM cavity and the laser gain medium. The weak intermolecular interaction and abundant excited‐state radiative decay process of organic materials enable OWGMLs to be functionalized toward desired performance and novel applications. Here, the fundamentals related to OWGMLs as well as the advances in the strategies to realizing and functionalizing OWGMLs are introduced and reviewed. The challenges remained are discussed with perspectives and outlook provided for the future development in this exciting field.