1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
2. Shandong Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Technology of Liaocheng University, Liaocheng 252059, China
3. Ultrafast Photophysics of Quantum Devices Laboratory, Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, United States