Spatial solitons in photonic lattices with large-scale defects

被引：0

作者：

杨晓雨 ^{[1
]}

郑江波 ^{[2
]}

董亮伟 ^{[2
]}

机构：

[1] College of Mathematics Physics and Information Engineering,Zhejiang Normal University

[2] Institute of Information Optics,Zhejiang Normal University

来源：

ChinesePhysicsB | 2011年 / 20卷 / 03期

基金：

中国国家自然科学基金;

关键词：

defect solitons; photonic lattices; saturable nonlinearity;

D O I：

暂无

中图分类号：

O437 [非线性光学（强光与物质的作用）];

学科分类号：

070207 ; 0803 ;

摘要：

We address the existence,stability and propagation dynamics of solitons supported by large-scale defects surrounded by the harmonic photonic lattices imprinted in the defocusing saturable nonlinear medium.Several families of soliton solutions,including flat-topped,dipole-like,and multipole-like solitons,can be supported by the defected lattices with different heights of defects.The width of existence domain of solitons is determined solely by the saturable parameter.The existence domains of various types of solitons can be shifted by the variations of defect size,lattice depth and soliton order.Solitons in the model are stable in a wide parameter window,provided that the propagation constant exceeds a critical value,which is in sharp contrast to the case where the soliton trains is supported by periodic lattices imprinted in defocusing saturable nonlinear medium.We also find stable solitons in the semi-infinite gap which rarely occur in the defocusing media.

引用

页码：261 / 266

页数：6