1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, China
2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
3. Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
4. Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong SAR, China
5. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China