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arXiv · 1309.6344

Motion of spin polariton bullets in semiconductor microcavities

C. Adrados·T. C. H. Liew·M. D. Martin·A. Amo·D. Sanvitto·C. Anton·E. Giacobino·A. Kavokin·A. Bramati·L. Vina
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Abstract

The dynamics of optical switching in semiconductor microcavities in the strong coupling regime is studied using time- and spatially-resolved spectroscopy. The switching is triggered by polarised short pulses which create spin bullets of high polariton density. The spin packets travel with speeds of the order of 106 m/s due to the ballistic propagation and drift of exciton-polaritons from high to low density areas. The speed is controlled by the angle of incidence of the excitation beams, which changes the polariton group velocity.

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C. Adrados, T. C. H. Liew, M. D. Martin, A. Amo, D. Sanvitto, C. Anton, E. Giacobino, A. Kavokin, A. Bramati, L. Vina. 2013-09-24. Motion of spin polariton bullets in semiconductor microcavities. https://doi.org/10.1103/physrevlett.107.146402

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