1. Department of Physics and Astronomy, Ultrafast Photophysics of Quantum Devices Laboratory, Clemson University, Clemson, South Carolina 29634, USA
2. Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China
3. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
4. King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia
5. Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina 29634, USA