Spatial optical solitons governed by quadratic nonlinearity

We demonstrate that a dielectric medium with purely quadratic nonlinearity [the so-called chi((2)) material] can display self-focusing phenomena through a new type of modulational instability of the interacting fundamental and second-harmonic field components and therefore can support propagation of...

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Bibliographic Details
Published in:Optics letters 1994-10, Vol.19 (20), p.1612-1614
Main Authors: Buryak, A V, Kivshar, Y S
Format: Article
Language:English
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Summary:We demonstrate that a dielectric medium with purely quadratic nonlinearity [the so-called chi((2)) material] can display self-focusing phenomena through a new type of modulational instability of the interacting fundamental and second-harmonic field components and therefore can support propagation of (two-wave) optical solitons. We prove the existence of a family of such solitons, which are found numerically and, in some particular cases, also analytically. The two-wave solitons are stable in the whole parameter region in which they exist.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.19.001612