Affiliation: | 1Institute of Optics and Electronics, Department of Physics, Xi'an University of Arts and Science, Xi'an 710065 ;2Institute of Photonics and Photonic Technology, Key Laboratory of Photoelectronic Technology of Shaanxi Province, Northwest University, Xi'an 710069 ;3 Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049 ;4State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068) |