1. Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, Analysis Technology Center, Advanced Core Technology Laboratories, Fuji Photo Film Co., Ltd, Minami-Ashigara, Kanagawa 250-0193, Japan, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan, and RIKEN, Wako, Saitama 351-0198, Japan