1. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2. School of Electrical Engineering, University of South China, Hengyang 421001, China
3. Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, IFSA Collaborative Innovation Center, School of Physics and Electronics, Hunan University, Changsha 410082, China