Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extraordinary transmission through a narrow slit   We revisit the problem of extraordinary transmission of acoustic
(electromagnetic) waves through a slit in a rigid (perfectly conducting) wall.
We use matched asymptotic expansions to study the pertinent limit where the
slit width is small compared to the wall thickness, the latter being
commensurate with the wavelength. Our analysis focuses on near-resonance
frequencies, furnishing elementary formulae for the field enhancement,
transmission efficiency, and deviations of the resonances from the Fabry-Perot
frequencies of the slit. We find that the apertures' near fields play a
dominant role, in contrast with the prevalent approximate theory of Takakura
[Physical Review Letters, 86 5601 (2001)]. Our theory agrees remarkably well
with numerical solutions and electromagnetic experiments [Suckling et al.,
Physical Review Letters, 92 147401 (2004)], thus providing a paradigm for
analyzing a wide range of wave propagation problems involving small holes and
slits.

9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org