1. Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China
2. Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
3. Department of Physics, Guangxi Minzu University, Nanning, 530006, China
4. College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China