Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear guided waves and symmetry breaking in left-handed waveguides   We analyze nonlinear guided waves in a planar waveguide made of a left-handed
material surrounded by a Kerr-like nonlinear dielectric. We predict that such a
waveguide can support fast and slow symmetric and antisymmetric nonlinear
modes. We study the symmetry breaking bifurcation and asymmetric modes in such
a symmetric structure. We analyze nonlinear dispersion properties of the guided
waves, and show that the modes can be both forward and backward.

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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th