Semidiscrete composite solitons in arrays of quadratically nonlinear waveguides

Optics Letters
Nicolae C PanoiuBoris A Malomed

Abstract

We demonstrate that an array of discrete waveguides on a slab substrate, both featuring chi2 nonlinearity, supports stable solitons composed of discrete and continuous components. Two classes of fundamental composite soliton are identified: ones consisting of a discrete fundamental-frequency (FF) component in the waveguide array, coupled to a continuous second-harmonic (SH) component in the slab waveguide, and solitons with an inverted FF/SH structure. Twisted bound states of the fundamental solitons are found, too. In contrast with the usual systems, the intersite-centered fundamental solitons and bound states with the twisted continuous components are stable over almost the entire domain of their existence.

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Citations

Jan 22, 2007·Optics Express·Dumitru MihalacheYuri S Kivshar
Apr 7, 2010·Physical Review Letters·F YeN C Panoiu
Nov 7, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Luca SalasnichFlavio Toigo
Dec 31, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Dumitru MihalacheYuri S Kivshar
Nov 8, 2019·Physical Review Letters·Xiliang ZhangYongyao Li

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