1. School of Mathematics-Physics and Finance and School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China
2. Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, China
3. School of Physics, Peking University, Beijing 100871, China
4. College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China