Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic tunneling through a single-negative slab paired with a
  double-positive bi-layer   We show that resonant tunneling of electromagnetic fields can occur through a
three-layer structure composed of a single-negative (i.e., either
negative-permittivity or negative-permeability) slab paired with bi-layer made
of double-positive (i.e., positive permittivity and permeability) media. In
particular, one of the two double-positive media can be chosen arbitrarily
(even vacuum), while the other may exhibit extreme (either near-zero or very
high) permittivity/permeability values. Our results on this counterintuitive
tunneling phenomenon also demonstrate the possibility of synthesizing
double-positive slabs that effectively exhibit single-negative-like
wave-impedance properties within a moderately wide frequency range.

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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: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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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: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci