%0 Journal Article
%T THz Generation by Optical Rectification and Competition with Other Nonlinear Processes<br>
%A ZHAO Zhen-Yu
%A HAMEAU Sophie
%A TIGNON Jerome
%A <br>
%J 中国物理快报
%D 2008
%I 
%X We present a study of the competition between tera-hertz (THz) generation by optical rectification in <110> ZnTe crystals, two-photon absorption, secondharmonic generation and free-carrier absorption. The two-photon nonlinear absorption coefficient, second harmonic generation efficiency and free-carrier absorption coefficient in the THz range are measured independently. The incident pump field is shown to be depleted by two-photon absorption and the THz radiation is shown to be reduced, upon focusing, by free-carrier absorption. The reduction of the generated THz radiation upon tight focusing is explained, provided that one also takes into account diffraction effects fromthe sub-wavelength THz source.
%K 75
%K 75
%K +a
%K 75
%K 50
%K Cc<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=7D6A465F63B207FDF0CED9273509D6FD&yid=67289AFF6305E306&vid=C5154311167311FE&iid=94C357A881DFC066&sid=945A0D4267ABB31D&eid=6405D27FCB03BF0F&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0