Surface defect gap solitons in two-dimensional optical lattices

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

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.

Keywords: surface defect gap soliton optical lattice saturable Kerr nonlinear media

Received: 28 November 2011
Revised: 07 December 2011
Accepted manuscript online:

PACS:	42.65.Tg	(Optical solitons; nonlinear guided waves)
	42.65.Jx	(Beam trapping, self-focusing and defocusing; self-phase modulation)
	42.65.Wi	(Nonlinear waveguides)

Fund: 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).

Corresponding Authors: Liu You-Wen
E-mail: ywliu@nuaa.edu.cn

Cite this article:

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 2012 Chin. Phys. B 21 074206

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Surface defect gap solitons in two-dimensional optical lattices

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