1. Centre for Terahertz Waves and College of Precision Instrument and Optoeletronics Engineering, Tianjin University 1 , Tianjin 300072, China
2. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences 2 , Chongqing 400714, China
3. Hebei Key Laboratory of Physics and Energy Technology, Department of Mathematics and Physics, North China Electric Power University 3 , Baoding 071003, China
4. Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences 4 , Jinan 250021, China
5. Guangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology 5 , Guilin 541004, China