Affiliation: | 1. Southwestern Institute of Physics, Chengdu 610041, China;2. School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116023, China;3. School of Physics and Chemistry, Xihua University, Chengdu 610041, China;4. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610041, China |