Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perfect absorption and giant magnification with a thin metamaterial
  layer   It is shown that perfect absorption and giant amplification can be realized
when a wave impinges on a special metamaterial layer with zero real parts of
the permittivity and permeability. The imaginary parts of the permittivity and
permeability remain nonzero, corresponding to finite loss or gain. Perfect
absorption and giant magnification can still be achieved even if the thickness
of the metamaterial layer is arbitrarily thin and the absolute imaginary parts
of the permittivity and permeability are very small. The metamaterial layer
needs a total-reflection substrate for perfect absorption, while this is not
required for giant magnification.

11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc