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Spin Dynamics of Cavity Polaritons

M. D. Martin·L. Vina·J. K. Son·E. E. Mendez
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Abstract

We have studied polariton spin dynamics in a GaAs/AlGaAs microcavity by means of polarization- and time-resolved photoluminescence spectroscopy as a function of excitation density and normal mode splitting. The experiments reveal a novel behavior of the degree of polarization of the emission, namely the existence of a finite delay to reach its maximum value. We have also found that the stimulated emission of the lower polariton branch has a strong influence on spin dynamics: in an interval of $\sim$150 ps the polarization changes from +100% to negative values as high as -60%. This strong modulation of the polarization and its high speed may open new possibilities for spin-based devices.

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M. D. Martin, L. Vina, J. K. Son, E. E. Mendez. 2000-03-30. Spin Dynamics of Cavity Polaritons. https://doi.org/10.1016/s0038-1098(00)00426-9

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