1. Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education) College of Optoelectronic Engineering Chongqing University Chongqing 400044 China
2. State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
3. Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing 100049 China
4. Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of Sciences Urumqi Xinjiang 830011 China