1. Division
of Electric, Electronic and Information Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan
2. SCIOCS, 880 Isagozawa-cho, Hitachi-shi, Ibaraki 319-1418, Japan
3. Graduate
School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
4. Synchrotron
Radiation Nanotechnology Center, University of Hyogo, 1-490-2, Kouto, Shingu-cho, Tatsuno-shi, Hyogo 679-5165, Japan