Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dual effect of surface plasmons in light transmission through perforated
  metal films   The light transmission through square and rectangular holes in a metal film
has been studied. By taking account of plasma response of real metal on hole
walls as well as metal surface, an analytical result for the transmission has
been deduced, which agrees well with the experiments. We show that the light
transmission involves both the diffraction modes and the surface plasmons.
Strong coupling of diffraction modes to surface plasmon polariton results in
the transmission minima, whereas the coupling to cavity surface plasmon leads
to the transmission maxima. The results suggest a dual-effect of the surface
plasmons.

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The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph