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Polariton motional narrowing in semiconductor multiple quantum wells

Polariton motional narrowing in semiconductor multiple quantum wells
Polariton motional narrowing in semiconductor multiple quantum wells
We demonstrate a new fast-scan ultrafast coherent reflectivity technique that tracks the amplitude and phase of excitons in GaAs heterostructures at densities down to 4 x 106 cm-2. Observed growth in the exciton coherence over the first 1.5 ps is direct evidence for the presence of interfering polariton modes. Polariton theory provides a good account of the data as the number of quantum wells is increased. Polariton motional narrowing of spectral lines from multiple quantum wells is demonstrated both experimentally and theoretically, annealing out the inhomogeneous broadening of the exciton energies.
COHERENT CONTROL, EXCITONS, CROSSOVER, DECAY, LIGHT
0031-9007
3567-3570
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Heberle, A.P.
0fd8af77-7331-4828-a442-707db2667588
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Vladimirova, M.R.
40b8cb0b-5121-48e1-93b8-cc3df9c05ef6
Kohler, K.
5cd0e325-7b42-4daf-84e2-162660f8a243
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Heberle, A.P.
0fd8af77-7331-4828-a442-707db2667588
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Vladimirova, M.R.
40b8cb0b-5121-48e1-93b8-cc3df9c05ef6
Kohler, K.
5cd0e325-7b42-4daf-84e2-162660f8a243

Baumberg, J.J., Heberle, A.P., Kavokin, A.V., Vladimirova, M.R. and Kohler, K. (1998) Polariton motional narrowing in semiconductor multiple quantum wells. Physical Review Letters, 80 (15), 3567-3570. (doi:10.1103/PhysRevLett.80.3567).

Record type: Article

Abstract

We demonstrate a new fast-scan ultrafast coherent reflectivity technique that tracks the amplitude and phase of excitons in GaAs heterostructures at densities down to 4 x 106 cm-2. Observed growth in the exciton coherence over the first 1.5 ps is direct evidence for the presence of interfering polariton modes. Polariton theory provides a good account of the data as the number of quantum wells is increased. Polariton motional narrowing of spectral lines from multiple quantum wells is demonstrated both experimentally and theoretically, annealing out the inhomogeneous broadening of the exciton energies.

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Published date: 1998
Keywords: COHERENT CONTROL, EXCITONS, CROSSOVER, DECAY, LIGHT

Identifiers

Local EPrints ID: 14670
URI: http://eprints.soton.ac.uk/id/eprint/14670
ISSN: 0031-9007
PURE UUID: 0b41f7a1-d8e1-4073-b0f1-8889d63e3532

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Date deposited: 16 Feb 2005
Last modified: 19 Nov 2021 17:47

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Contributors

Author: J.J. Baumberg
Author: A.P. Heberle
Author: A.V. Kavokin
Author: M.R. Vladimirova
Author: K. Kohler

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