%0 Journal Article
%T Theoretical study of tunable terahertz radiation based on difference-frequency generation in GaSe and ZnGeP2 crystals<br>基于GaSe和ZnGeP2晶体差频产生可调谐太赫兹辐射的理论研究
%A Liu Huan
%A Xu De-Gang
%A Yao Jian-Quan
%A <br>刘 欢
%A 徐德刚
%A 姚建铨
%J 物理学报
%D 2008
%I 
%X Based on the theory of nonlinear optical frequency conversion, the phase-match angle, walk-off angle, acceptance angle and effective nonlinear coefficient of difference-frequency in GaSe and ZnGeP2 crystals are calculated under different phase-matched conditions. In the theoretical simulation, the experimental parameters which were reported to generate widely tunable terahertz waves by nonlinear optical difference-frequency method are adopted. The optimum phase-matched conditions corresponding to different terahertz wave bands are summarized through comparing the whole calculated results. The calculated results provide a sound and comprehensive theoretical basis for using optical difference-frequency method to generate tunable terahertz wave in the nonlinear crystals.
%K terahertz wave
%K GaSe crystal
%K ZnGeP2 crystal
%K difference-frequency<br>太赫兹波，
%K GaSe晶体，
%K ZnGeP2晶体，
%K 差频
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=B2A8E114E11364CB9BB958A918F46688&yid=67289AFF6305E306&vid=11B4E5CC8CDD3201&iid=9CF7A0430CBB2DFD&sid=823F0325B2476A1A&eid=A773A3611173DF86&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0