1. School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. School of Physical Science and Technology, Southwest University, Chongqing 400715, China
3. Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
4. Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China