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- W2016291275 abstract "Near the orthoexciton resonance in ${mathrm{Cu}}_{2}mathrm{O}$, light propagating through the medium is accompanied by a quadrupolar polarization, a quadrupole polariton. However, these orthoexciton-polaritons can lose their initial coherence because the excitonic component of the mode, a tightly bound electron-hole pair, is subject to wide-angle scattering by atomic-scale imperfections within the crystal. In order to examine this scattering by ambient impurities, we measured the angular dependence of the orthoexciton-polariton luminescence under resonant two-photon excitation at $2phantom{rule{0.3em}{0ex}}mathrm{K}$. A rather broad angular distribution is obtained at higher impurity concentrations. We provide a simplified polariton scattering model in order to describe the observed angular distribution. Various experimental data obtained from two natural-growth samples indicate that the orthoexciton-polariton propagation can strongly depend on the local impurity concentration." @default.
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- W2016291275 date "2007-10-31" @default.
- W2016291275 modified "2023-09-26" @default.
- W2016291275 title "Impact of impurities on orthoexciton-polariton propagation inCu2O" @default.
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- W2016291275 doi "https://doi.org/10.1103/physrevb.76.155210" @default.
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