1. Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei Anhui 230026, China
2. USTC Center for Micro- and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei Anhui 230026, China
3. Physics School, Anhui University, Hefei Anhui 230601 China
4. Department of Physics, University of Science and Technology of China, Hefei Anhui 230027, China
5. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei Anhui 230027, China