1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
2. Automation College, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
3. School of Physics and Astronomy, Sun Yat-sen University Zhuhai campus, Zhuhai 519082, People's Republic of China