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Discrete quadratic solitons with competing second-harmonic components

Setzpfandt, Frank; Pertsch, Thomas; Sukhorukov, Andrey


We describe families of discrete solitons in quadratic waveguide arrays supported by competing cascaded nonlinear interactions between one fundamental and two second-harmonic modes. We characterize the existence, stability, and excitation dynamics of these solitons and show that their features may resemble those of solitons in saturable media. Our results also demonstrate that a power threshold may appear for soliton formation, leading to a suppression of beam self-focusing which explains...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.84.053843
Access Rights: Open Access


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