1. Department of Applied Chemistry, Kanagawa Institute of Technology, Atsugi, Kanagawa 243-0292, Japan, Department of Physics, Faculty of Science, Kanazawa University, Kanazawa 920-1192, Japan, Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8441, and The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan