Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Subwavelength internal imaging by means of the wire medium   Evanescent wave amplification is observed, for the first time to our
knowledge, inside a half-wavelength-thick wire medium slab used for
subwavelength imaging. The wire medium is analyzed using both a spatially
dispersive finite-difference time-domain (FDTD) method and a full-wave
commercial electromagnetic simulator CST Microwave Studio. In this work we
demonstrate that subwavelength details of a source placed at a distance of
one-tenth of a wavelength from a wire medium slab can be detected inside the
slab with a resolution of approximately one-tenth of a wavelength in spite of
the fact that they cannot be resolved at the front interface of the device, due
to the rapid decay of evanescent spatial harmonics in free space.

10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex