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Observation of nonlinear self-trapping of broad beams in defocusing waveguide arrays

Bennet, Francis; Alexander, Tristram J; Haslinger, Franz; Mitchell, Arnan; Neshev, Dragomir; Kivshar, Yuri


We demonstrate experimentally the localization of broad optical beams in periodic arrays of optical waveguides with defocusing nonlinearity. This observation in optics is linked to nonlinear self-trapping of Bose-Einstein-condensed atoms in stationary periodic potentials being associated with the generation of truncated nonlinear Bloch states, existing in the gaps of the linear transmission spectrum. We reveal that unlike gap solitons, these novel localized states can have an arbitrary width...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.106.093901
Access Rights: Open Access


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