1. College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing, China
2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin, China
3. College of Applied Sciences, Beijing University of Technology, Beijing, China
4. National Center for Applied Mathematics in Chongqing, Chongqing Normal University, Chongqing, China