[1] Waseda Univ, Dept Appl Phys, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan
[2] Shibaura Inst Technol, Engn Sci & Mech, Koto Ku, 3-7-5 Toyosu, Tokyo 1358548, Japan
[3] Waseda Univ, Dept Modern Mech Engn, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan