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Polarization Control of the Non-linear Emission on Semiconductor Microcavities

M. D. Martin·G. Aichmayr·L. Vina·R. Andre
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Abstract

The degree of circular polarization ($\wp$) of the non-linear emission in semiconductor microcavities is controlled by changing the exciton-cavity detuning. The polariton relaxation towards \textbf{K} $\sim 0$ cavity-like states is governed by final-state stimulated scattering. The helicity of the emission is selected due to the lifting of the degeneracy of the $\pm 1$ spin levels at \textbf{K} $\sim 0$. At short times after a pulsed excitation $\wp$ reaches very large values, either positive or negative, as a result of stimulated scattering to the spin level of lowest energy ($+1/-1$ spin for positive/negative detuning).

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M. D. Martin, G. Aichmayr, L. Vina, R. Andre. 2002-07-02. Polarization Control of the Non-linear Emission on Semiconductor Microcavities. https://doi.org/10.1103/physrevlett.89.077402

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