Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct experimental determination of critical disorder in
  one-dimensional weakly disordered photonic crystals   We report experimental measurement of critical disorder in weakly disordered,
one-dimensional photonic crystals. We measure the configurationally-averaged
transmission at various degrees of weak disorder. We extract the density of
states (DoS) after fitting the transmission with theoretical profiles, and
identify the Lifshitz tail realized by weak disorder. We observe the vanishing
of Van Hove singularities and the flattening of the DoS with increasing
disorder in our system. Systematic variation of disorder strength allows us to
study the behavior of Lifshitz exponent with the degree of disorder. This
provides a direct handle to the critical disorder in the one-dimensional
crystal, at which the transport behavior of the system is known to change. The
contradictory behavior at very weak disorder in the DoS variation at the
bandedge and the midgap are seen to resolve into synchronous behavior beyond
the critical disorder. The experimentally measured transmission is shown to
carry a clear signature of the critical disorder, which is in very good
agreement with the theoretically expected disorder.

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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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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: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th