1. Department of Electronic Chemistry, Interdisciplinary
Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan
2. Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
3. Rigaku Corporation, Akishima, Tokyo 196-8666, Japan