1. Department of Chemistry, University of Hawai’i at Ma̅noa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
2. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, P.R. China
3. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, P.R. China
4. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, P.R. China