作者机构:[1]State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China, [2]Department of Physics, Shanghai Normal University, Shanghai 200234, China, [3]Suzhou Jingpin Advanced Materials Co. Ltd., Jiangsu FOHO Science Park, Fenhu Town, Suzhou 215211, China, [4]School of Physics, Peking University, Beijing 100871, China
相关基金:This work was partly supported by the Na- tional Natural Science Foundation of China (Grant Nos. 11004060, 11027403, and 51132004).