Coherent dynamics of excitons in single and multiple quantum well structures

J. Kuhl; M. Huebner; T. Stroucken; B. Grote; A. Knorr; S. W. Koch; R. Hey; K. Ploog

Coherent dynamics of excitons in single and multiple quantum well structures

J. Kuhl, M. Huebner, T. Stroucken, B. Grote, A. Knorr, S. W. Koch, R. Hey, K. Ploog

Optical Sciences, College of

Research output: Contribution to conference › Paper › peer-review

Abstract

Four wave mixing degeneration experiments with circularly polarized pulses of 770 fs on single quantum wells (SQW) and multiple QW Bragg structures were performed. The QWs were separated by Al_0.3Ga_0.7As barriers. In high quality SQWs, radiative recombination yielded an important contribution to the excitonic dephasing and radiative lifetime of coherent excitons was 5 ps. Interwell exciton/exciton coupling mediated by transverse photon exchange existed in MQW Bragg structures. The radiative coupling depended on the number of QWs N, their spacing d, and the direction of the excitation beam. The radiative interwell coupling was a low excitation phenomenon and disappeared at higher excitation intensities.

Original language	English (US)
Number of pages	1
State	Published - Jan 1 1997
Event	Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim - Chiba, Jpn Duration: Jul 14 1997 → Jul 18 1997

Other

Other	Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim
City	Chiba, Jpn
Period	7/14/97 → 7/18/97

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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Coherent dynamics of excitons in single and multiple quantum well structures. / Kuhl, J.; Huebner, M.; Stroucken, T.; Grote, B.; Knorr, A.; Koch, S. W.; Hey, R.; Ploog, K.

1997. Paper presented at Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim, Chiba, Jpn, .

Research output: Contribution to conference › Paper › peer-review

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abstract = "Four wave mixing degeneration experiments with circularly polarized pulses of 770 fs on single quantum wells (SQW) and multiple QW Bragg structures were performed. The QWs were separated by Al0.3Ga0.7As barriers. In high quality SQWs, radiative recombination yielded an important contribution to the excitonic dephasing and radiative lifetime of coherent excitons was 5 ps. Interwell exciton/exciton coupling mediated by transverse photon exchange existed in MQW Bragg structures. The radiative coupling depended on the number of QWs N, their spacing d, and the direction of the excitation beam. The radiative interwell coupling was a low excitation phenomenon and disappeared at higher excitation intensities.",

author = "J. Kuhl and M. Huebner and T. Stroucken and B. Grote and A. Knorr and Koch, {S. W.} and R. Hey and K. Ploog",

year = "1997",

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T1 - Coherent dynamics of excitons in single and multiple quantum well structures

AU - Kuhl, J.

AU - Huebner, M.

AU - Stroucken, T.

AU - Grote, B.

AU - Knorr, A.

AU - Koch, S. W.

AU - Hey, R.

AU - Ploog, K.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Four wave mixing degeneration experiments with circularly polarized pulses of 770 fs on single quantum wells (SQW) and multiple QW Bragg structures were performed. The QWs were separated by Al0.3Ga0.7As barriers. In high quality SQWs, radiative recombination yielded an important contribution to the excitonic dephasing and radiative lifetime of coherent excitons was 5 ps. Interwell exciton/exciton coupling mediated by transverse photon exchange existed in MQW Bragg structures. The radiative coupling depended on the number of QWs N, their spacing d, and the direction of the excitation beam. The radiative interwell coupling was a low excitation phenomenon and disappeared at higher excitation intensities.

AB - Four wave mixing degeneration experiments with circularly polarized pulses of 770 fs on single quantum wells (SQW) and multiple QW Bragg structures were performed. The QWs were separated by Al0.3Ga0.7As barriers. In high quality SQWs, radiative recombination yielded an important contribution to the excitonic dephasing and radiative lifetime of coherent excitons was 5 ps. Interwell exciton/exciton coupling mediated by transverse photon exchange existed in MQW Bragg structures. The radiative coupling depended on the number of QWs N, their spacing d, and the direction of the excitation beam. The radiative interwell coupling was a low excitation phenomenon and disappeared at higher excitation intensities.

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T2 - Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim

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