Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transmission properties of periodic nonlinear structures containing left
  handed materials   We study the transmission properties of a nonlinear periodic structure
containing alternating slabs of a nonlinear right handed material and a linear
left handed material. We find that the transmission associated with the zero
averaged- refractive- index gap exhibits a bistable characteristic that is
relatively insensitive to incident angle. This is in contrast to the nonlinear
behavior of the usual Bragg gap

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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom