Author Affiliations

Yan Liang,¹ Min Ren,¹ E Wu,¹ Guang Wu,^1,* and Heping Zeng^1,2,*

¹State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China

²Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

^*Corresponding author: gwu@phy.ecnu.edu.cn, hpzeng@phy.ecnu.edu.cn