Surface defect gap solitons in two-dimensional optical lattices

doi:10.1088/1674-1056/21/7/074206

中国物理B ›› 2012, Vol. 21 ›› Issue (7): 74206-074206.doi: 10.1088/1674-1056/21/7/074206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Surface defect gap solitons in two-dimensional optical lattices

孟云吉, 刘友文, 唐宇煌

Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

收稿日期:2011-11-28 修回日期:2011-12-07 出版日期:2012-06-01 发布日期:2012-06-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11174147) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2009366).

Surface defect gap solitons in two-dimensional optical lattices

Meng Yun-Ji(孟云吉), Liu You-Wen(刘友文)^†, and Tang Yu-Huang(唐宇煌)

Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2011-11-28 Revised:2011-12-07 Online:2012-06-01 Published:2012-06-01
Contact: Liu You-Wen E-mail:ywliu@nuaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11174147) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2009366).

摘要/Abstract

摘要： We investigate the existence and stability of surface defect gap solitons at an interface between a defect of two-dimensional optical lattice and 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.

关键词: surface defect gap soliton, optical lattice, saturable Kerr nonlinear media

Abstract: We investigate the existence and stability of surface defect gap solitons at an interface between a defect of two-dimensional optical lattice and 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.

Key words: surface defect gap soliton, optical lattice, saturable Kerr nonlinear media

中图分类号: (Optical solitons; nonlinear guided waves)

42.65.Tg

42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.65.Wi (Nonlinear waveguides)

孟云吉, 刘友文, 唐宇煌 . Surface defect gap solitons in two-dimensional optical lattices[J]. 中国物理B, 2012, 21(7): 74206-074206.

Meng Yun-Ji(孟云吉), Liu You-Wen(刘友文), and Tang Yu-Huang(唐宇煌) . Surface defect gap solitons in two-dimensional optical lattices[J]. Chin. Phys. B, 2012, 21(7): 74206-074206.

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Surface defect gap solitons in two-dimensional optical lattices

Surface defect gap solitons in two-dimensional optical lattices

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