1. Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
2. Institute for Materials Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi 980-8577, Japan
3. New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
4. C&A corporation, 1-16-23 Ichibancho, Aoba-ku, Sendai, Miyagi 980-0811, Japan
5. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan