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Observation of dipole-like gap solitons in self-defocusing waveguide lattices

Liqin Tang, Cibo Lou, Xiaosheng Wang, Daohong Song, Xingyu Chen, Jingjun Xu, Zhigang Chen, H. Susanto, K. Law, and P. G. Kevrekidis

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Abstract

We observe dipole-like gap solitons in two-dimensional waveguide lattices optically induced with a self-defocusing nonlinearity. Under appropriate conditions, two mutually coherent input beams excited in neighboring lattice sites evolve into a self-trapped state, whose spatial power spectrum and stability depend strongly on the initial excitation conditions. Our experimental observations are compared with numerical simulations.

© 2007 Optical Society of America

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