Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences, Shanghai 201800, China

¹ Institute of Modern Physics, Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China

² College of Physical and Information Technology, Shaanxi Normal University, Xi’an 710062, China

³ Lab. for Quantum Optics National Education Commission

⁴ Joint Lab. for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics and East China Normal University, Shanghai 200062, China and Department of Physics, East China Normal University, Shanghai 200062, China

¹ Laboratory of Quantum Communication and Quantum Computation,University of Science and Technology of China, Hefei 230026, China

² Department of Physics, Anhui University, Hefei 230039, China

Phys. Dept. of Xiamen Univ., Xiamen 361005, China

State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments, Tsinghua University, Beijing 100084, China

The State Key Laboratory on Fiber-Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University, Shanghai 200030, China

Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences, Shanghai 201800, China

¹ School of Power and Energy Engineering,Shanghai Jiao Tong University, Shanghai 200030, China

² School of Power and Energy Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

¹ Dept. of Optical Engineering, Zhejiang University, Hangzhou 310027, China

² Dept. of Applied Physics, Zhejiang University of Technology, Hangzhou 310014, China

Department of Information & Electronic Engineering,Zhejiang University, Hangzhou 310027, China

Center of Photon Technology, Nankai University, Tianjin 300071, China

Department of Electronic Engineering, Southeast University, Nanjing 210096, China

College of Material Science and Engineering of Huazhong University of Sci. & Tech., Wuhan 430074, China

Key Lab of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei 230031, China

Institute of Semiconductors, The Chinese Academy of Sciences,National Engineering Research Center for Optoelectronics Devices, Beijing 100083, China