1. College of Physics Science and Engineering Technology, Yichun University, Yichun, Jiangxi Province 336000, China
2. College of Literature, Journalism and Communication, Yichun University, Yichun, Jiangxi Province 336000, China
3. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei Province 430074, China
4. Laboratory for Micro-Nano Physics and Technology of Hunan Province, School of Physics and Electronics, Hunan University, Changsha 410082, China