Affiliation: | (1) NTT Integrated Information & Energy Systems Laboratories, 3-9-11 Musasino-shi, Tokyo, 180-8585, Japan;(2) 162 Tokai, Ibaraki-ken, 319-1193, Japan;(3) Present address: Institute of Advanced Material Study, Kyushu University, Kasuga Koen 6-1, Kasuga, 816-8580, Japan |