1. Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
2. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
3. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
4. Laboratoire de Physique et Chimie Théoriques, CNRS-Université de Lorraine, UMR7019, 57070 Metz, France