1 State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, and HEDPS, School of Physics, Peking University, Beijing 100094, China; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
2 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China.
3 State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, and HEDPS, School of Physics, Peking University, Beijing 100094, China.
4 Key Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100094, China.
5 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China; School of Astronomy and Space Sciences, University of Science and Technology of China, Hefei 230026, China. Electronic address: xfwu@pmo.ac.cn.
6 State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, and HEDPS, School of Physics, Peking University, Beijing 100094, China; Frontiers Science Center for Nano-optoelectronic, Peking University, Beijing 100094, China. Electronic address: bqiao@pku.edu.cn.