作者机构:[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China, [2]Graduate School of the Chinese Academy of Sciences, Beijin g 100049, China
相关基金:Supported by a Key Program of the Knowledge Innovation Project of Chinese Academy of Sciences, National Natural Science Foundation of China (Grant No.10375085) and National Basic Research Program of China (Grant No.2003CB716901)