作者机构:[1]College of Science, Tianjin University of Technology, Tianjin 300191, China, [2]Department of Physics, Yantai University, Yantai 264005, China, [3]Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China
相关基金:Project supported by the National Basic Research Program of China (Grant No 2006CB921404), and the National Natural Science Foundation of China (Grant Nos 10574015 and 10547136).