Discrete solitons in inhomogeneous waveguide arrays

Chaos
Thomas PertschFalk Lederer

Abstract

The existence and dynamical properties of discrete solitons in inhomogeneous waveguide arrays with a Kerr nonlinearity are studied in two different configurations. First we investigate the effect of a longitudinal periodic modulation of the coupling strength on the dynamics of discrete solitons. It is shown that resonances of internal modes of the soliton with the longitudinal structure may lead to soliton oscillations and decay. Second we study the existence and stability of discrete solitons in arrays exhibiting a linear variation of the waveguide effective index in the transverse direction. We find that resonant coupling between conventional discrete solitons and linear Wannier-Stark states leads to the formation of so-called hybrid discrete solitons.

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Citations

May 4, 2010·Optics Letters·Xinyuan QiYuri S Kivshar
Feb 1, 2008·Physical Review Letters·Yaroslav V KartashovLluis Torner

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