1. Transparent Electro-Active Materials Project, ERATO, Japan Science and Technology Corporation, KSP C-1232, 3-2-1 Sakado, Tatatsu-ku, Kawasaki 213-0012, Japan, Chemical Resources Laboratory and Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan