Intrinsic non-linearities in exciton-cavity-coupled systems

We investigate the mechanisms leading to the optical non-linearities observed on a strongly excited semiconductor microcavity containing quantum wells. This study of a coupled exciton–cavity system is possible owing to the availability of a sample of exceptionally high quality, permitting to exclude...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1999-12, Vol.272 (1), p.472-475
Main Authors: Saba, M, Quochi, F, Ciuti, C, Bongiovanni, G, Mura, A, Oesterle, U, Staehli, J.L, Deveaud, B
Format: Article
Language:English
Subjects:
Exciton
Femtosecond
Microcavity
Saturation
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Summary:We investigate the mechanisms leading to the optical non-linearities observed on a strongly excited semiconductor microcavity containing quantum wells. This study of a coupled exciton–cavity system is possible owing to the availability of a sample of exceptionally high quality, permitting to exclude effects of disorder and inhomogeneous broadening. Sub-picosecond pump and probe experiments are performed, in the regime of an incoherent exciton gas of high density. For such a gas the dephasing due to collisions is not efficient enough to cause the break-down of the strong coupling and hence the collapse of the Rabi splitting. Phase-space filling and exchange effects are the dominant mechanisms.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)00323-3