1. Department of Physics, Faculty of Science, Shizuoka University, 836, Ohya, Suruga, Shizuoka 422-8529, Japan
2. Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku Naka, Hamamatsu 432-8011, Japan
3. Graduate School of Design and Architecture, Nagoya City University, 2-1-10 Kita-Chikusa, Chikusa, Nagoya 464-0083, Japan