%0 Journal Article
%T Giant Birefringence of Lithium Niobate Crystals in the Terahertz Region
%A SUN Yi-Min
%A MAO Zong-Liang
%A HOU Bi-Hui
%A LIU Guo-Qing
%A WANG Li
%A <br>孙毅民
%A 毛宗良
%A 侯碧辉
%A 刘国庆
%A 汪力
%J 中国物理快报
%D 2007
%I 
%X Terahertz time-domain spectroscopy (THz-TDS) is used to study the spectral response of lithium niobate crystals (LiNbO3) in the far infrared region. The optical constants are derived from the measured complex refractive index. A giant birefringence is observed in this material, and the average refractive-index difference between the ordinary wave and the extraordinary wave, no-ne, can reach up to about 1.6. Such a large birefringence is attributed to the different phonon modes of A1(z) and E(x,y). This unusual property makes LiNbO3 a promising material to be used as a functional material in the terahertz region, e.g. employed as wave-plates and polarization separators.
%K 42
%K 25
%K Bs
%K 42
%K 25
%K Lc
%K 78
%K 20
%K Fm<br>锂铌酸
%K 晶体
%K 双折射
%K 光谱学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=A6F1F92187EC7BB8B5521DCC96423AF5&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=0B39A22176CE99FB&sid=3081401A9FAB9CE2&eid=84A93BA251D28205&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0