*Siyuan Zha¹, Akihiko Hirata¹ (1. Department of Materials Science, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University)

*Tomoya KOIZUMI¹, Ken Niwa¹, Takuya Sasaki¹, Masashi Hasegawa¹ (1. Nagoya Univ.)

*Tatsuhiro Yamauchi¹, Hironari Okada^1,2, Rie Umetsu³ (1. Graduate School of Engineering, Tohoku Gakuin Univ, 2. Faculty of Engineering, Tohoku Gakuin Univ, 3. Institute for Materials Research, Tohoku Univ)

*Kazuki ONO¹, Satoru Kobayashi¹ (1. Iwate Univ)

*Yuta ASANO¹, Kentaro KYUNO^1,2 (1. Shibaura Institute of Technology, 2. SIT International Research Center for Green Electronics)