Surface defect gap solitons in two-dimensional optical lattices

We investigate the existence and stability of surface defect gap solitons at an interface between a defect in a two-dimensional optical lattice and a uniform saturable Kerr nonlinear medium. The surface defect embedded in the two-dimensional optical lattice gives rise to some unique properties. It i...

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Bibliographic Details
Published inChinese physics B Vol. 21; no. 7; pp. 314 - 319
Main Author 孟云吉 刘友文 唐宇煌
Format Journal Article
LanguageEnglish
Published 01.07.2012
Subjects
A defects
Defects
Nonlinearity
Optical lattices
Solitons
Stability
Surface defects
Two dimensional
光晶格
差距
无限大
晶格缺陷
稳定性
表面缺陷
隙孤子
非线性介质
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/7/074206

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Summary:We investigate the existence and stability of surface defect gap solitons at an interface between a defect in a two-dimensional optical lattice and a uniform saturable Kerr nonlinear medium. The surface defect embedded in the two-dimensional optical lattice gives rise to some unique properties. It is interestingly found that for the negative defect, stable surface defect gap solitons can exist both in the semi-infinite gap and in the first gap. The deeper the negative defect, the narrower the stable region in the semi-infinite gap will be. For a positive defect, the surface defect gap solitons exist only in the semi-infinite gap and the stable region localizes in a low power region.
Bibliography:surface defect gap soliton, optical lattice, saturable Kerr nonlinear media
11-5639/O4
Meng Yun-Ji, Liu You-Wen, and Tang Yu-Huang Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
We investigate the existence and stability of surface defect gap solitons at an interface between a defect in a two-dimensional optical lattice and a uniform saturable Kerr nonlinear medium. The surface defect embedded in the two-dimensional optical lattice gives rise to some unique properties. It is interestingly found that for the negative defect, stable surface defect gap solitons can exist both in the semi-infinite gap and in the first gap. The deeper the negative defect, the narrower the stable region in the semi-infinite gap will be. For a positive defect, the surface defect gap solitons exist only in the semi-infinite gap and the stable region localizes in a low power region.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/7/074206