1. College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
2. Department of Fundamental Courses, Wuxi Institute of Technology, Wuxi 214121, China
3. Department of Physics, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
4. College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China