Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low loss, low dispersion and highly birefringent terahertz porous fibers   We demonstrate that porous fibers have low effective material loss over an
extended frequency range, 4.5 times larger bandwidth than that can be achieved
in sub-wavelength solid core fibers. We also show that these new fibers can be
designed to have near zero dispersion for 0.5-1 THz resulting to overall less
terahertz signal degradation. In addition, it is demonstrated that the use of
asymmetrical sub-wavelength air-holes within the core leads to high
birefringence ~0.026. This opens up the potential for realization of novel
polarization preserving fibers in the terahertz regime.

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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess