[1] School of Physics and Material Science, Anhui University, Hefei 230039, China
[2] Department of Physics and Electronic Engineering, Hefei Normal University, Hefei 230601, China
[3] Department of Mathematics and Physics, Anhui University of Architecture, Hefei 230601, China
[4] State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, Liaoning, China