Eight-band k⋅p calculations of the composition contrast effect on the linear polarization properties of columnar quantum dots

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dc.contributor.authorAndrzejewski, Janusz
dc.contributor.authorSek, Grzegorz
dc.contributor.authorO'Reilly, Eoin P.
dc.contributor.authorFiore, Andrea
dc.contributor.authorMisiewicz, Jan
dc.contributor.funderScience Foundation Ireland
dc.contributor.funderSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
dc.contributor.funderSixth Framework Programme
dc.date.accessioned2017-09-20T10:06:35Z
dc.date.available2017-09-20T10:06:35Z
dc.date.issued2010
dc.description.abstractWe present eight-band k . p calculations of the electronic and polarization properties of columnar InzGa1-zAs quantum dots (CQD) with high aspect ratio embedded in an InxGa1-xAs/GaAs quantum well. Our model accounts for the linear strain effects, linear piezoelectricity, and spin-orbit interaction. We calculate the relative intensities of transverse-magnetic (TM) and transverse-electric (TE) linear polarized light emitted from the edge of the semiconductor wafer as a function of the two main factors affecting the heavy hole-light hole valence band mixing and hence, the polarization dependent selection rules for the optical transitions, namely, (i) the composition contrast z/x between the dot material and the surrounding well and (ii) the dot aspect ratio. The numerical results show that the former is the main driving parameter for tuning the polarization properties. This is explained by analyzing the biaxial strain in the CQD, based on which it is possible to predict the TM to TE intensity ratio. The conclusions are supported by analytical considerations of the strain in the dots. Finally, we present the compositional and geometrical conditions to achieve polarization independent emission from InGaAs/GaAs CQDs. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3346552]en
dc.description.sponsorshipEUFP6 project ZODIAC [FP6/017140];Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [PP0022-112405]en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid73509
dc.identifier.citationAndrzejewski, J., Sęk, G., O’Reilly, E., Fiore, A. and Misiewicz, J. (2010) 'Eight-band k⋅p calculations of the composition contrast effect on the linear polarization properties of columnar quantum dots', Journal of Applied Physics, 107(7), 073509 (12pp). doi: 10.1063/1.3346552en
dc.identifier.doi10.1063/1.3346552
dc.identifier.endpage12
dc.identifier.issn0021-8979
dc.identifier.issued7
dc.identifier.journaltitleJournal of Applied Physicsen
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/4745
dc.identifier.volume107
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.urihttp://aip.scitation.org/doi/10.1063/1.3346552
dc.rights© 2010, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Andrzejewski, J., Sęk, G., O’Reilly, E., Fiore, A. and Misiewicz, J. (2010) 'Eight-band k⋅p calculations of the composition contrast effect on the linear polarization properties of columnar quantum dots', Journal of Applied Physics, 107(7), 073509 (12pp). doi: 10.1063/1.3346552 and may be found at http://aip.scitation.org/doi/10.1063/1.3346552en
dc.subjectPolarizationen
dc.subjectQuantum dotsen
dc.subjectValence bandsen
dc.subjectWave functionsen
dc.subjectIII-V semiconductorsen
dc.titleEight-band k⋅p calculations of the composition contrast effect on the linear polarization properties of columnar quantum dotsen
dc.typeArticle (peer-reviewed)en
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