Author Affiliations

T. Murakawa,⁽¹⁾ G. Cincotti,⁽²⁾ S. Shimizu,⁽³⁾ T. Nagashima,⁽¹⁾ M. Hasegawa,⁽¹⁾ K. Hattori,⁽⁴⁾ M. Okuno,⁽⁴⁾ S. Mino,⁽⁴⁾ A. Himeno,⁽⁴⁾ N. Wada,⁽³⁾ H. Uenohara,⁽⁵⁾ and T. Konishi⁽¹⁾

⁽¹⁾Graduate School of Engineering, Osaka University, Japan

⁽²⁾Engineering Department, University Roma Tre, via V. Volterra 62, I-00143 Rome, Italy

⁽³⁾NICT 4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

⁽⁴⁾NTT Electronics Co. Ltd. 6700-2 to,Naka-shi,Ibaraki,311-0122, Japan

⁽⁵⁾Tokyo Institute of Technology 4259 Nagatsuta, Midoriku, Yokohama 226-8503, Japan