1. School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
2. Department of Physics, Anhui Normal University, Wuhu 241000, Anhui, China
3. Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Wuhu 241000, China
4. School of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China