スイヅ　コウジ   Koji Suizu   水津　光司    所属   千葉工業大学  工学部 情報通信システム工学科    千葉工業大学  工学研究科 情報通信システム工学専攻    職種   教授
言語種別	英語
発行・発表の年月	2013/05
形態種別	学術雑誌
査読	査読あり
標題	Widely tunable broadband terahertz radiation generation using a configurationally locked polyene 2-[3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene] malononitrile crystal via difference frequency generation
執筆形態	共著
掲載誌名	Applied Physics B
巻・号・頁	111(3),pp.489-493
著者・共著者	Hirohisa Uchida, Saroj R. Tripathi, Koji Suizu, Takayuki Shibuya, Takashi Osumi, and Kodo Kawase
概要	Widely tunable terahertz (THz) waves were successfully generated from 0.5 to 10 THz via difference frequency generation (DFG) in a configurationally locked polyene 2-[3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene] malononitrile (OH1) crystal. Potassium titanium oxide phosphate optical parametric oscillator pumped by nanosecond Q-switched Nd:YAG laser was used to generate two waves, which were then used to irradiate OH1 crystal. The maximum energy of the generated THz wave was about 461 pJ/pulse. We investigated the dependency of generated THz energy to the excitation pump power density and OH1 crystal thickness. In addition, we compared the THz energy generated by OH1 crystal to 4-N, N-dimethylamino-40-N0-methyl-4-stilbazolium tosylate (DAST) crystal using DFG, and we achieved 560 times higher energy using OH1 crystal than DAST crystal at around 1.1 THz.