1 Tianjin University, Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China), Tianjin, China
2 Shanxi Datong University, Institute of Solid State Physics and College of Physics and Electronic Science, Shanxi Province Key Laboratory of Microstructure Electromagnetic Functional Materials, Datong, China
3 Wuhan University of Technology, School of Information Engineering, Wuhan, China
4 Tianjin Normal University, College of Physics and Materials Science, Tianjin, China
5 City University of New York, Advanced Science Research Center, Photonics Initiative, New York, United States
6 City University of New York, Graduate Center, Physics Program, New York, United States
7 University of Hong Kong, Faculty of Science, Department of Physics, Hong Kong, China
8 University of Hong Kong, Department of Electrical and Electronic Engineering, Hong Kong, China
9 Guilin University of Electronic Technology, Guangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin, China
10 Oklahoma State University, School of Electrical and Computer Engineering, Stillwater, Oklahoma, United States