1. School of Physical Science and Technology, Key Laboratory of Advanced Technology of Materials Ministry of Education of China, Southwest Jiaotong University, Chengdu 610031, China
2. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
3. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China