1. SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2. Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
3. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798