The Key Laboratory of Optoelectronics Information Science & Technology,EMC, The Institute of Optoelectronics Precision Instrument,Tianjin University, Tianjin 300072, China
1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China
2 National Engineering Research Center for Laser Processing, HUST, Wuhan 430074, China