[1] Kyushu Univ, Fac Sci, Dept Phys, Fukuoka 8128581, Japan
[2] Kyushu Univ, Fac Engn, Dept Appl Sci, Fukuoka 8128581, Japan
[3] Fukuoka Univ, Fac Sci, Dept Appl Phys, Fukuoka 8140180, Japan
[4] Asahi Chem Ind Co Ltd, Chem Technol Dept 4, Miyazaki 8820847, Japan