Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Broadband Circular Polarizers Constructed by Helix-like Chiral
  Metamaterials   In this paper, a kind of helix-like chiral metamaterial, which can be
realized with multiple conventional lithography or electron beam lithographic
techniques, is proposed to achieve broadband bianisotropic optical response
analogous to helical metamaterial. On the basis of twisted metamaterial, via
tailoring the relative orientation within the lattice, the anisotropy of arc is
converted into magneto-electric coupling of closely spaced arc pairs, which
leads to a broad bianisotropic optical response. By connecting the adjacent
upper and lower arcs, the coupling of metasurface pairs is transformed to the
coupling of the three-dimensional inclusions, and provides a much broader and
higher bianisotropic optical response. For only a four-layer helix-like
metamaterial, the maximum extinction ratio can reach 19.7. The operation band
is in the wavelength range from 4.69 {\mu}m to 8.98 {\mu}m with an average
extinction ratio of 6.9. And the transmittance for selective polarization is
above 0.8 in the entire operation band. Such a structure is promising for
integratable and scalable broadband circular polarizers, especially has great
potential to act as broadband circular micropolarizers in the field of the
full-stokes division of focal plane polarimeters.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys