Semidiscrete composite solitons in arrays of quadratically nonlinear waveguides

Nicolae C. Panoiu*, Richard M. Osgood, Boris A. Malomed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We demonstrate that an array of discrete waveguides on a slab substrate, both featuring x2 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.

Original languageEnglish
Pages (from-to)1097-1099
Number of pages3
JournalOptics Letters
Issue number8
StatePublished - 15 Apr 2006


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