1. Graduate School of Science and Technology, Kobe University, Nada, Kobe 657-8501
2. Molecular Photosience Research Center, Kobe University, Nada, Kobe 657-8501
3. Venture Business Laboratory, Kobe University, Nada, Kobe 657-8501
4. Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku, Tokyo 152-8550
5. Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581