Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-Dimensional Organic Microlasers with Low Lasing Thresholds
  Fabricated by Multiphoton Lithography   Cuboid-shaped organic microcavities containing a pyrromethene laser dye and
supported upon a photonic crystal have been investigated as an approach to
reducing the lasing threshold of the cavities. Multiphoton lithography
facilitated fabrication of the cuboid cavities directly on the substrate or on
the decoupling structure, while similar structures were fabricated on the
substrate by UV lithography for comparison. Significant reduction of the lasing
threshold by a factor of ~30 has been observed for cavities supported by the
photonic crystal relative to those fabricated on the substrate. The lasing mode
spectra of the cuboid microresonators provide strong evidence showing that the
lasing modes are localized in the horizontal plane, with the shape of an
inscribed diamond.

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The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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The categories of this paper are: astro-ph
16
The categories of this paper are: stat
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
37
The categories of this paper are: supr-con