supported by the National Key R&D Program of China(Grant No.2023YFB2806700);the National Natural Science Foundation of China(Grant No.92365210);the Tsinghua Initiative Scientific Research Program,and the project of Tsinghua University-Zhuhai Huafa Industrial Share Company Joint Institute for Architecture Optoelectronic Technologies(JIAOT).
Optical spectrum analysis provides a wealth of information about the physical world.Throughout the development of optical spectrum analysis,sensitivity has been one of the major topics and has become essential in appl...