1. Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, China
2. Key Laboratory of Optoelectronics Technology of Education Ministry of China, Faculty of Information Technology, and the Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, China
3. North China Research Institute of Electro-Optics, Beijing, China