Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metasurfaces for the Infrared Spectral Range Fabricated Using Two-Photon
  Polymerization   Fabrication of metasurfaces is ofthen time consuming and expensive, involving
complex lithographic processes. The maskless fabrication of metasurfaces
composed of rectangular Au bars is reported as a suitable alternative,
providing cost-effective, rapid prototyping of metasurfaces. The investigated
metasurfaces were fabricated using a simple three-step process which is
discussed in detail. The fabrication process establishes a simple method for
producing high fidelity 2D patterns suitable to synthesize metasurfaces for
chemical sensing, beam steering, and perfect reflection/transmission.
Comprehensive polarization-sensitive reflection data reveal multiple resonances
in the infrared spectral range. In addition to the dipole and substrate
resonances, a resonance which is attributed to a coupling between the
excitation of the metasurface and the substrate phonon mode is observed.

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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol