1. Freie Universität Berlin, Institut für
Chemie und Biochemie, Takustrasse 3, 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