Surface superlattice solitons in nonlocal nonlinear media

doi:10.1088/1674-1056/18/11/050

Abstract

Abstract We analyse surface solitons at the interface between a one-dimensional photonic superlattice and a uniform medium with weak nonlocal nonlinearity. We demonstrate that in deep lattices there exist three kinds of surface solitons when the propagation constant exceeds a critical value, including two on-site solitons and one off-site soliton. These three kinds of surface solitons have unique dynamical properties. If the relative depth of the superlattice is low, there is only one kind of off-site soliton; however, the solitons of this kind can propagate stably, unlike their deep superlattice counterparts. Dipole surface solitons are also investigated, and the stable domain is given.

Keywords: surface solitons superlattice nonlocal nonlinearity

Received: 31 July 2008
Revised: 10 April 2009
Accepted manuscript online:

PACS:	42.65.Tg	(Optical solitons; nonlinear guided waves)
	42.79.-e	(Optical elements, devices, and systems)
	42.70.Qs	(Photonic bandgap materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10874250, 10674183 and 10804131) and National Basic Research Program of China (Grant No 2004CB719804).

Cite this article:

Huang Hui-Chang(黄惠昌), He Ying-Ji(何影记), and Wang He-Zhou(汪河洲) Surface superlattice solitons in nonlocal nonlinear media 2009 Chin. Phys. B 18 4919

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