Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-consistent calculations of loss compensated fishnet metamaterials   We present a computational approach, allowing for a self-consistent treatment
of three-dimensional (3D) fishnet metamaterial coupled to a gain material
incorporated into the nanostructure. We show numerically that one can
compensate the losses by incorporating gain material inside the fishnet
structure. The pump rate needed to compensate the loss is much smaller than the
bulk gain and the figure of merit (FOM = |Re(n)/Im(n)|) increases dramatically
with the pump rate. Transmission, reflection, and absorption data, as well as
the retrieved effective parameters, are presented for the fishnet structure
with and without gain material. Kramers-Kronig relations of the effective
parameters are in excellent agreement with the retrieved results with gain.

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The categories of this paper are: eess
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas