Author Affiliations

Fumiyoshi Kuwashima,^* Takuya Shirao,^* Masahiko Tani,^** Kazuyoshi Kurihara,^*** Kohji Yamamoto,^** Masanori Hangyo,^**** Takeshi Nagashima,^**** and Hiroshi Iwasawa^*****

^*Department of Electrical, Electronics and Computer Engineering, Fukui University of Technology, 3-6-1Gakuen, Fukui-shi, Fukui 910-8505, Japan

^**Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyou, Fukui-shi, Fukui 910-8507, Japan

^***Faculty of Education and Regional Studies, University of Fukui, 3-9-1 Bunkyou, Fukui-shi, Fukui 910-8507, Japan

^****Institute of Laser Engineering, Osaka University, 2-6Yamadaoka, Suita-shi, Osaka 565-0871, Japan

^*****Professor Emeritus, University of Fukui, 3-9-1 Bunkyou, Fukui-shi, Fukui 910-8507, Japan