Institution: | [1]Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics Chinese Academy of Sciences, Changchun 130033, P. R. China [2]Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China [3]Institute of Condensed State Physics, Jilin Normal University, Siping 136000, P. R. China |