Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultra-Thin Absorber based on Phase Change Metamaterial Superlattice   In this paper, a superlattice VO2/SiO2 metamaterial on a lossy substrate is
designed to create a near perfect absorber with tunability across the infrared
spectrum. We selected VO2 as it presents a dielectric to metal-like phase
change slightly above room temperature. Additionally, the slightly lossy nature
of high-temperature VO2 presents comparable and small components (real and
imaginary) of the complex refractive index across portions of the visible and
infrared. Coupled with a limited conductivity substrate, VO2 has been employed
to create highly absorbing/emitting structures where the thickness of the VO2
is ultra-thin (t << lambda/4n). Nevertheless, metal-like VO2 does not possess
comparable and small components of the complex refractive index across the
entire infrared spectrum, which limits the universality of this ultra-thin VO2
absorber design. Here we employ an ultra-thin superlattice of VO2/SiO2 to
create a composite metamaterial that is readily designed for high absorbance
across the infrared spectrum.

14
The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
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The categories of this paper are: econ
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph