YANG Jing hai1,2,3, CAO Yu ming1,2,3, WANG Ya xin3, LIU Hui lian3, ZHANG Yong jun3
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; 3. The Institute of Condensed State Physics, Jilin Normal University, Siping 136000, Jilin Province, China