Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Harmonic generation and energy transport in dielectric and
  semiconductors at visible and UV wavelengths: the case of GaP   We study inhibition of absorption, transparency, energy and momentum
transport of the inhomogeneous component of harmonic pulses in dielectrics and
semiconductors, at visible and UV wavelengths, focusing on materials like GaP.
In these spectral regions GaP is characterized by large absorption, metallic
behavior or a combination of both. We show that phase locking causes the
generated inhomogeneous signals to propagate through a bulk metallic medium
without being absorbed, that is occurs even in centrosymmetric materials via
the magnetic Lorentz force, and that the transport of energy and momentum is
quite peculiar and seemingly anomalous. These results make it clear that there
are new opportunities in ultrafast nonlinear optics and nano-plasmonics in new
wavelength ranges.

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The categories of this paper are: eess
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat