1. Beijing Advanced Innovation Center for Imaging Theory and Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing 100048, China
2. Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong SAR 999077, People’s Republic of China
3. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
4. School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China