S. S. Gavrilov, A. V. Sekretenko, N. A. Gippius, C. Schneider, S. Höfling, M. Kamp, A. Forchel, V. D. Kulakovskii
Chirality of cavity polaritons, brought on by lifted degeneracy of right- and left-circularly polarized polariton levels, makes possible a new kind of multistability that manifests itself in fast (few tens of picoseconds) spin-flip transitions in the cavity field under a resonant pump with fixed polarization but varying intensity. This effect is due to resonance-shifting polariton-polariton interactions; it has been described within a coherent mean-field approach and observed experimentally using pulsed 70 picosecond long excitation in a magnetic field.
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http://arxiv.org/abs/1212.5787
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