Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Full Band Structure Calculation of Two-photon Indirect Absorption in
  Bulk Silicon   Degenerate two-photon indirect absorption in silicon is an important limiting
effect on the use of silicon structures for all-optical information processing
at telecommunication wavelengths. We perform a full band structure calculation
to investigate two-photon indirect absorption in bulk silicon, using a
pseudopotential description of the energy bands and an adiabatic bond charge
model to describe phonon dispersion and polarization. Our results agree well
with some recent experimental results. The transverse acoustic/optical
phonon-assisted processes dominate.

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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th