1. Department of Applied Physics, School of Science, Hunan University of Technology, Zhuzhou 412007, China
2. College of Science, National University of Defense Technology, Changsha 410073, China
3. School of Information Engineering, Huangshan University, Huangshan 245041, China
4. Department of Physics, Shangqiu Normal University, Shangqiu 476000, China
5. Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Hebei University, Baoding 071002, China