Institution: | 1. Research and Development Center for Higher Education, Kyushu University, Fukuoka 810-8560, Japan;2. Department of Physics, Faculty of Science, Kyushu University, Fukuoka 812-8581, Japan;3. Department of Physics, Faculty of Science, Toyama University, Toyama 930-8555, Japan;4. Faculty of Engineering, Kyoto Sangyo University, Kyoto 603-8555, Japan;5. Angewandte Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany |