1. School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
2. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
3. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
4. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China