1. College of Physics and Electronic Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224051, China
2. Ordnance NCO Academy in Army Engineering University of PLA, Wuhan 430075, China
3. College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
4. Department of Physics, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
5. Chongqing Key Laboratory of Optical and Electronic Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China