1. School of Science, Harbin Institute of Technology, Shenzhen 518055, China
2. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
3. School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
4. Key Laboratory of Micro-Nano Optoelectronic Information System of Ministry of Industry and Information Technology, Harbin Institute of Technology, Shenzhen 518055, China