作者机构:[1]Department of Physics, Dalian Maritime University, Dalian 116026, China, [2]School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
相关基金:Project supported by the National Natural Science Foundation of China (Grant Nos. 10975026, 11275034, and 11175052), the Key Project of Science and Technology of Liaoning Province, China (Grant No. 2011224007), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. 3132014328).