%0 Journal Article
%T Screening Solitons in Biased Centrosymmetric Photorefractive Media<br>有偏压中心对称光折变晶体中的屏蔽孤子
%A Li Jinping
%A Lu Keqing
%A Zhao Wei
%A Yang Yanlong
%A Zhu Xiangping
%A Guo Xiaohui
%A <br>李金萍
%A 卢克清
%A 赵卫
%A 杨延龙
%A 朱香平
%A 过晓辉
%J 光子学报
%D 2006
%I 
%X The space-charge field with a higer-order nonlinearity in biased centrosymmetric photorefractive media is presented. When the higer-order term can be neglected, this space-charge field is that studied previously in biased centrosymmetric photorefractive media. The nonlinear wave equation with a higer-order nonlinearity is investigated in biased centrosymmetric photorefractive media, which can exhibit bright and dark spatial solitons under appropriate conditions. The nonlinear change in the refractive index in centrosymmetric photorefractive media resulted from the quadratic electro-optic effect, rather than the linear electro-optic effect in noncentrosymmetric media. The stability of these spatial solitons is discussed using beam propagation methods, and it has been found that optical spatial solitons in biased centrosymmetric photorefractive media are stable against small perturbations in amplitude not broken up.
%K Nonlinear optics
%K Optical soliton
%K Photorefractive crystal
%K Kerr effect<br>非线性光学
%K 光孤子
%K 光折变晶体
%K Kerr效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=2B25A49359E34479&yid=37904DC365DD7266&vid=6209D9E8050195F5&iid=0B39A22176CE99FB&sid=4290346F7268639E&eid=89AC6B0ADBEA2741&journal_id=1004-4213&journal_name=光子学报&referenced_num=6&reference_num=18