Suppression of the bragg reflection in semiconductor multiple quantum wells by excitation induced dephasing

M. Hübner; J. Kuhl; S. Haas; T. Stroucken; S. W. Koch; R. Hey; K. Ploog

doi:10.1016/S0038-1098(97)10038-2

Suppression of the bragg reflection in semiconductor multiple quantum wells by excitation induced dephasing

M. Hübner, J. Kuhl, S. Haas, T. Stroucken, S. W. Koch, R. Hey, K. Ploog

Optical Sciences, College of

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Time resolved reflectivity measurements of multiple-quantum-well Bragg structures show a strong reduction of the reflectivity at increased excitation levels. At low intensities, a pump-induced contrast of more than 20% in the reflectivity of a 10 quantum well Bragg structure is observed and attributed to the superradiant coupling between the quantum-well excitons. This superradiant state is gradually suppressed for increasing excitation densities due to rapid loss of phase coherence via excitation induced dephasing.

Original language	English (US)
Pages (from-to)	105-108
Number of pages	4
Journal	Solid State Communications
Volume	105
Issue number	2
DOIs	https://doi.org/10.1016/S0038-1098(97)10038-2
State	Published - Jan 1998

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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abstract = "Time resolved reflectivity measurements of multiple-quantum-well Bragg structures show a strong reduction of the reflectivity at increased excitation levels. At low intensities, a pump-induced contrast of more than 20% in the reflectivity of a 10 quantum well Bragg structure is observed and attributed to the superradiant coupling between the quantum-well excitons. This superradiant state is gradually suppressed for increasing excitation densities due to rapid loss of phase coherence via excitation induced dephasing.",

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AU - Hübner, M.

AU - Kuhl, J.

AU - Haas, S.

AU - Stroucken, T.

AU - Koch, S. W.

AU - Hey, R.

AU - Ploog, K.

PY - 1998/1

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AB - Time resolved reflectivity measurements of multiple-quantum-well Bragg structures show a strong reduction of the reflectivity at increased excitation levels. At low intensities, a pump-induced contrast of more than 20% in the reflectivity of a 10 quantum well Bragg structure is observed and attributed to the superradiant coupling between the quantum-well excitons. This superradiant state is gradually suppressed for increasing excitation densities due to rapid loss of phase coherence via excitation induced dephasing.

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