Surface defect gap solitons in one-dimensional dual-frequency lattices and simple lattices

被引:6
|
作者
Zheng, Li-Xian [1 ]
Zhu, Xing [1 ]
Li, Huagang [2 ]
He, Ying-Ji [3 ]
机构
[1] S China Univ Technol, Sch Sci, Dept Phys, Guangzhou 510640, Peoples R China
[2] Guangdong Univ Educ, Dept Phys, Guangzhou 510303, Guangdong, Peoples R China
[3] Guangdong Polytech Normal Univ, Sch Elect & Informat, Guangzhou 510665, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
PHOTONIC LATTICES; DISCRETE SOLITONS; OPTICAL LATTICES; ITERATION METHODS; SOLITARY WAVES; NONLINEARITIES; SUPERLATTICE; INTERFACE; MEDIA;
D O I
10.1364/JOSAB.28.002070
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report the existence and stability of surface defect gap solitons in one-dimensional semi-infinite dual-frequency lattices and semi-infinite simple lattices with a defect between them in the saturable nonlinear medium. By changing the defect intensity, defect solitons can exist in different gaps. For a positive defect, solitons only exist in the semi-infinite gap and can be stable in the low power region. With an increase of the negative defect depth, defect solitons will exist in the semi-infinite gap, first gap, and the second gap. (C) 2011 Optical Society of America
引用
收藏
页码:2070 / 2074
页数:5
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