1. State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
2. School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Key Laboratory of Polar Materials and Devices of MOE, East China Normal University, Shanghai 200241, China
5. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
6. State Key Laboratory for Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha 410082, China