1. Shanghai Frontiers Science Center of Quantum and Superconducting Matter States, Department of Physics, Shanghai University, Shanghai 200444, China
2. School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
3. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
4. Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, 516 JunGong Road, Shanghai 200093, China
5. Institute of Laser and Opto-electronics, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China