1. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
2. Department of Chemistry, School of Science, Tokai University, Kawayou, Minamiaso, Aso, Kumamoto 869–1404, Japan
3. Department of Materials Process Engineering, Graduate School of Engineering, Kyushu University, 744 Nishikyo Motooka, Fukuoka 819–0395, Japan
4. Ceramic Research Center of Nagasaki, Hiekoba, Hasami, Higashisonogi, Nagasaki 859–3726, Japan
5. Furukawa Co., Ltd., Kannondai, Tsukuba, Ibaraki 1–25–13, Japan
6. Tokuyama Corporation Shibuya, 3–3–1, Shibuya, Tokyo 150–8383, Japan
7. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2–1–1 Katahira, Aoyou, Sendai, Miyagi 980–8577, Japan
8. Central Research Laboratory, Hamamatsu Photonics K. K., 5000 Hiraguchi, Hamakitaku, Hamamatsu, Shizuoka 434–8601, Japan