Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of energy relaxation rates near metal-coated dielectric
  cylinders   The electromagnetic modes and their field distributions are evaluated for a
dielectric cylindrical structure embedded in another dielectric, with a thin
metallic film at the cylinder/dielectric interface. These modes provide energy
relaxation channels for excited dipole emitters located inside or outside the
cylinder. Significantly, we find that the emission rate is sensitive to the
magnitude of the electron density of the metallic film coating. For typical
parameter values, we find large enhancements of the emission rate, which can be
in excess of three orders of magnitude, relative to the case in the absence of
the film, arising at specific ranges of electron density. The theory is shown
to conform with known limits, including the high density (perfect conductor)
limit and the large distance (unbounded bulk) limit. The implications of the
predicted enhancement due to the metal coating for the purpose of guiding atoms
within such microstructures are pointed out.

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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex