1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering South China Normal University Guangzhou 510006 P. R. China
2. School of Optoelectronic Engineering Guangdong Polytechnic Normal University Guangzhou 510665 P. R. China
3. State Key Laboratory of Optoelectronic Materials and Technologies | School of Electronics and Information Technology Sun Yat‐sen University No. 135, Xingang Xi Road Guangzhou Guangdong 510275 P. R. China
4. Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong 999077 P. R. China
5. Key Laboratory of Optoelectronic Technology and Systems (Chongqing University), Ministry of Education, School of Optoelectronic Engineering Chongqing University Chongqing 400044 P. R. China
6. College of Physics and Information Engineering Minnan Normal University Zhangzhou 363000 P. R. China