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Stimulated Scattering of Microcavity Polaritons

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Bloch J., Senellart P., Thierry-Mieg V., Marzin J. Y.
Acta Physica Polonica A
|
2000
|
vol. 98
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issue 3
295-302
EN
We report on cw optical experiments performed in a semiconductor microcavity containing a single quantum well in the strong coupling regime. Angularly resolved photoluminescence measurements under non-resonant excitation show the collapse of a relaxation bottleneck as the excitation power is increased. As a result, the emission close to k_{∥}=0 presents a non-linear behavior. In a two-beam experiment we resonantly inject polaritons at k_{∥}=0 and show that relaxation from states with large in-plane wave vector toward k_{∥}=0 is stimulated by the polariton final state population.
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