[14a-B2-1~11] 3.9 Terahertz technologies

[14a-B2-6] Broadband terahertz generation by using OPCPA ultrashort NIR pulse

〇Yu Mukai¹, Nobuhisa Ishii², Keisuke Kaneshima², Hirohisa Uchida³, Jiro Itatani², Koichiro Tanaka⁴ (1.iCeMS, Kyoto Univ., 2.ISSP, Univ. Tokyo, 3.Arkray Inc., 4.Kyoto Univ.)

Keywords:Terahertz, organic nonlinear crystal, nonlinear optics

We report the generation of intense broaband terahertz pulse via difference frequency generation of OPCPA ultrashort NIR pulse in DAST crystal, which has the high nonlinear coefficient and satisfies the phase matching condition for the broadband input spectrum. The generated terahertz pulse has the high peak electric field of 1 MV/cm and the broad spectrum reaching up to 20 THz.