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Exciton bleaching in p-type single and double quantum wells: the effects of subband occupation and wave function overlap

We have studied exciton unbinding in empty and p-doped single and double quantum wells, using magneto-photoluminescence excitation measurements. The use of p-type heterostructures allows to discriminate unambiguously between exciton bleaching by Coulomb screening and by the Pauli exclusion principle...

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Bibliographic Details
Main Authors: Kemerink, Martijn (Author) , Koenraad, Paulus M. (Author) , Parlangeli, A. (Author) , Christianen, Peter (Author) , Schaijk, Rob van (Author) , Maan, Jan C. (Author) , Wolter, Joachim H. (Author)
Format: Article (Journal)
Language:English
Published: 16 November 2001
In: Physica status solidi. A, Applications and materials science
Year: 1997, Volume: 164, Issue: 1, Pages: 73-76
ISSN:1862-6319
DOI:10.1002/1521-396X(199711)164:1<73::AID-PSSA73>3.0.CO;2-D
Online Access:Verlag, Volltext: https://doi.org/10.1002/1521-396X(199711)164:1<73::AID-PSSA73>3.0.CO;2-D
Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/1521-396X%28199711%29164%3A1%3C73%3A%3AAID-PSSA73%3E3.0.CO%3B2-D
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Author Notes:M. Kemerink, P.M. Koenraad, A. Parlangeli, P.C.M. Christianen, R. Van Schaijk, J.C. Maan, and J.H. Wolter
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Summary:We have studied exciton unbinding in empty and p-doped single and double quantum wells, using magneto-photoluminescence excitation measurements. The use of p-type heterostructures allows to discriminate unambiguously between exciton bleaching by Coulomb screening and by the Pauli exclusion principle. The groundstate heavy-hole exciton, which experiences both effects, is unbound at hole densities in the range (6 to 11)×1015 m—2. In contrast, the groundstate light-hole and first excited heavy-hole excitons, which only experience Coulomb screening, still have a finite binding energy at these densities. We found that the excitons of excited subbands are far less efficiently screened than those of the light-hole groundstate, due to the lesser overlap of the screening groundstate heavy holes with the excited subbands than with the groundstate light holes.
Item Description:Elektronische Reproduktion der Druckausgabe
Vom Autor zietiert als: Exciton screening in p-type quantum wells
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Physical Description:Online Resource
ISSN:1862-6319
DOI:10.1002/1521-396X(199711)164:1<73::AID-PSSA73>3.0.CO;2-D

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