Defect solitons in kagome optical lattices

被引：44
作者：
Zhu, Xing [1 ]
Wang, Hong [1 ,2 ]
Zheng, Li-Xian [1 ]
机构：
[1] S China Univ Technol, Sch Sci, Guangdong Engn Res Ctr Semicond Lighting, Guangzhou 510640, Guangdong, Peoples R China
[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 20期
基金：
中国国家自然科学基金;
关键词：
PHOTONIC LATTICES; ITERATION METHODS; SOLITARY WAVES; LIGHT;
D O I：
10.1364/OE.18.020786
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the existence and stability of solitons in kagome optical lattices with a defect in photorefractive crystal under focusing saturable nonlinearity. For different types of defects, solitons will exist in different gaps. For a positive defect, the solitons only exist in the semi-infinite gap and only stably exist in the low power region. For a negative defect, the solitons exist both in the semi-infinite gap and the first gap. With an increasing of the negative defect depth, the stable region in the semi-infinite will be narrowed, while solitons will be firstly unstable in the high power region of the first gap, and finally solitons will be not stable in the whole first gap. (C) 2010 Optical Society of America
引用
收藏
页码：20786 / 20792
页数：7
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