1. School of Physics and Electronics, Shandong Normal University, 250358 Jinan, China
2. MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Science, Nanjing University of Science and Technology, 210094 Nanjing, China
3. Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, 230026 Hefei, China