Institution: | 1. Department of Physics, Tokyo Institute of Technology, 2-12-1-H81 Ookayama, Meguro, Tokyo 152-8551, Japan;2. NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan;3. JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan |