Affiliation: | 1.School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China ;2.Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian, 116024, China ;3.Basic Teaching Department, Shenyang Institute of Engineering, Shenyang, 110136, China ;4.School of Physics and Electronic Technology, Liaoning Normal University, Dalian, 116029, China ; |