Institution: | a Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan b PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan c Photodynamics Research Center, RIKEN (Institute of Physical and Chemical Research), Sendai 980-0845, Japan d Combinatorial Materials Exploration and Technology (COMET), Tsukuba 305-0044, Japan |