Publication Date

2009

Journal or Book Title

PHYSICAL REVIEW A

Abstract

We investigate the existence and stability of gap vortices and multipole gap solitons in a kagome lattice with a defocusing nonlinearity both in a discrete case and in a continuum one with periodic external modulation. In particular, predictions are made based on expansion around a simple and analytically tractable anticontinuum (zero-coupling) limit. These predictions are then confirmed for a continuum model of an optically induced kagome lattice in a photorefractive crystal obtained by a continuous transformation of a honeycomb lattice.

Comments

This is the prepublished version harvested from ArXiv. The published version is located at http://pra.aps.org/abstract/PRA/v79/i5/e053818

Pages

-

Volume

79

Issue

5

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