1 State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
2 Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
3 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
4 Department of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
5 Peking University Yangtze Delta Institute of Optoelectronics, Nantong 226010, China
6 e-mail: chunhua@ustc.edu.cn
7 e-mail: qinghai.song@hit.edu.cn
8 e-mail: yfxiao@pku.edu.cn