National Natural Science Foundation of China(12064010,11904013,11847165,11775190);Natural Science Foundation of Jiangxi Province(20192ACB21002);National Basic Research Program of China(973 Program)(2014CB921401);Tsinghua University Initiative Scientific Research Program;Tsinghua National Laboratory for Information Science and Technology(TNList)Crossdiscipline Foundation。
Stimulated emission and absorption are two fundamental processes of light–matter interaction, and the coefficients of the two processes should be equal. However, we will describe a generic method to realize the signi...