Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-angle collimation of incident light in $\mathbf{\mu}$-near-zero
  metamaterials   We use the theory of inhomogeneous waves to study the transmission of light
in $\mu$-near-zero metamaterials. We find the effect of all-angle collimation
of incident light, which means that the vector of energy flow in a wave
transmitted to a $\mu$-near-zero metamaterial is perpendicular to the interface
for any incident angles if an incident wave is s-polarized. This effect is
similar to the all-angle collimation of incident light recently found through a
different theoretical framework in $\varepsilon$-near-zero metamaterials for a
p-polarized incident wave [S. Feng, Phys. Rev. Lett. 108, 193904 (2012)]. To
provide a specific example, we consider the transmission of light in a
negative-index metamaterial in the spectral region with a permeability
resonance, and show that all-angle collimation indeed takes place at the
wavelength for which the real part of permeability is vanishingly small.

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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
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The categories of this paper are: nlin