Affiliation: | aDepartment of Electrical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan bAdvanced Materials Development Department, Tokuyama Corporation, 1-1 Mikage, Shunan, Yamaguchi 745-8648, Japan cTsukuba Research Laboratory, Tokuyama Corporation, 40 Wadai, Tsukuba, Ibaraki 300-4247, Japan |