Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Birefringence and dispersion of cylindrically polarized modes in
  nanobore photonic crystal fiber   We demonstrate experimentally and theoretically that a nanoscale hollow
channel placed centrally in the solid glass core of a photonic crystal fiber
strongly enhances the cylindrical birefringence (the modal index difference
between radially and azimuthally polarized modes). Furthermore, it causes a
large split in group velocity and group velocity dispersion. We show
analytically that all three parameters can be varied over a wide range by
tuning the diameters of the nanobore and the core.

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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con