dc.identifier.uri |
http://dx.doi.org/10.15488/2087 |
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dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/2112 |
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dc.contributor.author |
Pfalz, S.
|
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dc.contributor.author |
Winkler, R.
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dc.contributor.author |
Nowitzki, T.
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dc.contributor.author |
Reuter, D.
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dc.contributor.author |
Wieck, A.D.
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dc.contributor.author |
Hägele, D.
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dc.contributor.author |
Oestreich, Michael
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dc.date.accessioned |
2017-10-20T13:44:33Z |
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dc.date.available |
2017-10-20T13:44:33Z |
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dc.date.issued |
2005 |
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dc.identifier.citation |
Pfalz, S.; Winkler, R.; Nowitzki, T.; Reuter, D.; Wieck, A.D. et al.: Optical orientation of electron spins in GaAs quantum wells. In: Physical Review B - Condensed Matter and Materials Physics 71 (2005), Nr. 16, No. 16530. DOI: https://doi.org/10.1103/PhysRevB.71.165305 |
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dc.description.abstract |
We present a detailed experimental and theoretical analysis of the optical orientation of electron spins in GaAs/AlAs quantum wells. Using time and polarization resolved photoluminescence excitation spectroscopy, the initial degree of electron-spin polarization is measured as a function of excitation energy for a sequence of quantum wells with well widths between 63 and 198 Å. The experimental results are compared with an accurate theory of excitonic absorption taking fully into account electron-hole Coulomb correlations and heavy-hole–light-hole coupling. We find in wide quantum wells that the measured initial degree of polarization of the luminescence follows closely the spin polarization of the optically excited electrons calculated as a function of energy. This implies that the orientation of the electron spins is essentially preserved when the electrons relax from the optically excited high-energy states to quasithermal equilibrium of their momenta. Due to initial spin relaxation, the measured polarization in narrow quantum wells is reduced by a constant factor that does not depend on the excitation energy. © 2005 The American Physical Society. |
eng |
dc.language.iso |
eng |
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dc.publisher |
College Park, MD : American Physical Society |
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dc.relation.ispartofseries |
Physical Review B 71 (2005), Nr. 16 |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
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dc.subject.ddc |
530 | Physik
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ger |
dc.title |
Optical orientation of electron spins in GaAs quantum wells |
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dc.type |
Article |
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dc.type |
Text |
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dc.relation.issn |
10980121 |
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dc.relation.doi |
https://doi.org/10.1103/PhysRevB.71.165305 |
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dc.bibliographicCitation.issue |
16 |
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dc.bibliographicCitation.volume |
71 |
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dc.bibliographicCitation.firstPage |
165305 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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