Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semi-discrete solitons in arrayed waveguide structures with Kerr
  nonlinearity   We construct families of optical semi-discrete composite solitons (SDCSs),
with one or two independent propagation constants, supported by a planar slab
waveguide, XPM-coupled to a periodic array of stripes. Both structures feature
the cubic nonlinearity and support intrinsic modes with mutually orthogonal
polarizations. We report three species of SDCSs, odd, even, and twisted ones,
the first type being stable. Transverse motion of phase-tilted solitons, with
potential applications to beam steering, is considered too.

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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: supr-con
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph