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Non-linear coupling of polariton and dark exciton states in semiconductor microcavities

Non-linear coupling of polariton and dark exciton states in semiconductor microcavities
Non-linear coupling of polariton and dark exciton states in semiconductor microcavities
We report a new mechanism of non-linear coupling of optically active and dark crystal states. We observe experimentally pronounced beats of the intensity of photoluminescence from a bottleneck region of the exciton-polariton band in a microcavity in the strong coupling regime and at strong pumping. These beats are extremely sensitive to the pumping intensity and vanish for weak pumping. We show theoretically that coherent polariton–polariton scattering which leads to the mixing between bright and dark exciton states can be responsible for this effect.
A. microcavities, D. bottleneck, D. coherence, D. dark excitons, D. polaritons, D. quantum beats, E. time-resolved spectroscopy
1-6
Shelykh, I.A.
7dad78b3-4681-410a-abf2-39f3bb16c41f
Vina, L.
32af2867-e016-4cbf-a835-438d5edc52e2
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Galkin, N.G.
16c6d6a5-d19e-40bf-a1f5-6928acccf448
Malpuech, G.
da5f02e8-b721-4a4b-a3fc-cb756b396e4a
Andre, R.
29b4b400-64d0-4bd2-bca7-0a92288c3b08
Shelykh, I.A.
7dad78b3-4681-410a-abf2-39f3bb16c41f
Vina, L.
32af2867-e016-4cbf-a835-438d5edc52e2
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Galkin, N.G.
16c6d6a5-d19e-40bf-a1f5-6928acccf448
Malpuech, G.
da5f02e8-b721-4a4b-a3fc-cb756b396e4a
Andre, R.
29b4b400-64d0-4bd2-bca7-0a92288c3b08

Shelykh, I.A., Vina, L., Kavokin, A.V., Galkin, N.G., Malpuech, G. and Andre, R. (2005) Non-linear coupling of polariton and dark exciton states in semiconductor microcavities. Solid State Communications, 135 (1-2), 1-6. (doi:10.1016/j.ssc.2005.04.012).

Record type: Article

Abstract

We report a new mechanism of non-linear coupling of optically active and dark crystal states. We observe experimentally pronounced beats of the intensity of photoluminescence from a bottleneck region of the exciton-polariton band in a microcavity in the strong coupling regime and at strong pumping. These beats are extremely sensitive to the pumping intensity and vanish for weak pumping. We show theoretically that coherent polariton–polariton scattering which leads to the mixing between bright and dark exciton states can be responsible for this effect.

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More information

Published date: 2005
Keywords: A. microcavities, D. bottleneck, D. coherence, D. dark excitons, D. polaritons, D. quantum beats, E. time-resolved spectroscopy

Identifiers

Local EPrints ID: 57594
URI: http://eprints.soton.ac.uk/id/eprint/57594
PURE UUID: fc2441da-1295-4d07-a5d5-7027efc7e7f9

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Date deposited: 13 Aug 2008
Last modified: 13 Mar 2019 20:33

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