1. Laboratory for Chemistry and Life Science (CLS), Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
2. ERATO–JST, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
3. Graduate School of Arts and Sciences, International Christian University, Mitaka, Tokyo 181-8585, Japan