1. Research Institute of Electronics, Shizuoka University, 3-5-1, Johoku,
Naka-ku, Hamamatsu 432-8011, Japan
2. Department of Physics, “Alexandru Ioan Cuza” University, 11, Carol I Blvd., 700506 Iasi, Romania
3. Department of Sciences & Research Institute for Agriculture and Environment, University of Agricultural Sciences and Veterinary Medicine “Ion Ionescu de la Brad”, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania
4. Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu 432-8561, Japan