Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evanescent wave interference and the total transparency of a warm
  high-density plasma slab   It is shown that an overcritical density plasma slab can be totally
transparent to a \textit{p}-polarized obliquely incident electromagnetic wave.
High transparency is achieved due to the interference of the evanescent waves
in the subcritical region. The transmission coefficient has the resonant
character due to the excitation of a plasma surface mode (plasmon-polariton).
It is crucial that two evanescent waves have certain phase shift to provide
non-zero energy flux through non-transparent region. The required phase shift
is obtained at the exact resonance and corresponds to the absolute
transparency. In a warm plasma case, the excitation of the propagating
longitudinal (electrostatic) modes becomes possible. We demonstrate that these
longitudinal excitations facilitate the total transparency of an opaque plasma
slab creating additional resonances in the transmission property of the system.

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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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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: chao-dyn
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The categories of this paper are: alg-geom
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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: econ
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con