Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic field induced nutation of the exciton-polariton polarization in
  (Cd,Zn)Te crystals   We study the polarization dynamics of exciton-polaritons propagating in
sub-mm thick (Cd,Zn)Te bulk crystals using polarimetric time-of-flight
techniques. The application of a magnetic field in Faraday geometry leads to
synchronous temporal oscillations of all Stokes parameters of an initially
linearly or circularly polarized, spectrally broad optical pulse of 150 fs
duration propagating through the crystal. Strong dispersion for photon energies
close to the exciton resonance leads to stretching of the optical pulse to a
duration of 200$-$300 ps and enhancement of magneto-optical effects such as the
Faraday rotation and the non-reciprocal birefringence. The oscillation
frequency of the exciton-polariton polarization increases with magnetic field
$B$, reaching 10 GHz at $B\sim 5$T. Surprisingly, the relative contributions of
Faraday rotation and non-reciprocal birefringence undergo strong changes with
photon energy, which is attributed to a non-trivial spectral dependence of
Faraday rotation in the vicinity of the exciton resonance. This leads to
polarization nutation of the transmitted optical pulse in the time domain. The
results are well explained by a model that accounts for Faraday rotation and
magneto-spatial dispersion in zinc-blende crystals. We evaluate the exciton
$g$-factor $|g_{\rm exc}|=0.2$ and the magneto-spatial constant $V= 5 \times
10^{-12}$ eVcm$\textup{T}^{-1}$.

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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: acc-phys