作者机构:[1]Department of Physics, College of Science, Tianjin University of Science and Technology, Tianjin 300222, China, [2]School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100083, China, [3]Group of Physics, 19th Middle School of Tianjin, Tianjin 300020, China
相关基金:Project supported by the National Natural Science Foundation of China (Grant No. 50871074), and the Natural Science Foundation of Tianjin University of Science and Technology, China (Grant No. 0200153).