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Opt Lett. 1998 Oct 15;23(20):1579-81.

Circular solitons do not exist in photorefractive media.

Abstract

The shape of two-dimensional solitary beams propagating in photorefractive media with an externally applied field is studied. The analytical results indicate that, for both focusing and defocusing nonlinearities, radially symmetric self-channeled beams do not exist. Some recent experiments are interpreted in light of the present results.

PMID:
18091850

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