IndiumV3, Russie, Analysis, bibRecord, 000169

Comparative Magneto-Photoluminescence Study of Ensembles and of Individual InAs Quantum Dots

Identifieur interne : 000169 ( Russie/Analysis ); précédent : 000168; suivant : 000170

Comparative Magneto-Photoluminescence Study of Ensembles and of Individual InAs Quantum Dots

Auteurs : RBID : Pascal:09-0093147

Descripteurs français

Pascal (Inist)
- Etude comparative, Photoluminescence, Arséniure d'indium, Semiconducteur III-V, Composé III-V, Point quantique, Nanomatériau, Arséniure de gallium, Mouillage, Mouillabilité, Effet champ électrique, Champ extérieur, InAs, GaAs, 7867, 8107T, 8535B, 8107B.

English descriptors

KwdEn :
- Comparative study, Electric field effects, External fields, Gallium arsenides, III-V compound, III-V semiconductors, Indium arsenides, Nanostructured materials, Photoluminescence, Quantum dots, Wettability, Wetting.

Abstract

We report on magneto-photoluminescence studies of InAs/GaAs quantum dots (QDs) of considerably different densities, from dense ensembles down to individual dots. It is found that a magnetic field applied in Faraday geometry decreases the photoluminescence (PL) intensity of QD ensembles, which is not accompanied by the corresponding increase of PL signal of the wetting layer on which QDs are grown. The model suggested to explain these data assumes considerably different strengths of suppression of electron and hole fluxes by a magnetic field. This idea has been successfully checked in experiments on individual QDs, where the PL spectra allow to directly monitor the charge state of a QD and, hence, to conclude about relative magnitudes of electron and hole fluxes toward the QD. Comparative studies of different individual QDs have revealed that the internal electric field in the sample (which was altered in the experiments in a controllable way) together with an external magnetic field will determine the charge state and emission intensity of the QDs.

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Pascal:09-0093147

Le document en format XML

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<author><name sortKey="Moskalenko, Evgenii S" uniqKey="Moskalenko E">Evgenii S. Moskalenko</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Chemistry and Biology (IFM), Linkoping University</s1>
<s2>581 83 Linkoping</s2>
<s3>SWE</s3>
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<country>Suède</country>
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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>A. F. loffe Physical-Technical Institute, Russian Academy of Sciences, 194021, Polytechnicheskaya 26</s1>
<s2>St. Petersburg</s2>
<s3>RUS</s3>
<sZ>1 aut.</sZ>
</inist:fA14>
<country>Russie</country>
<wicri:noRegion>St. Petersburg</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Larsson, L Arvid" uniqKey="Larsson L">L. Arvid Larsson</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Chemistry and Biology (IFM), Linkoping University</s1>
<s2>581 83 Linkoping</s2>
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<author><name sortKey="Larsson, Mats" uniqKey="Larsson M">Mats Larsson</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Chemistry and Biology (IFM), Linkoping University</s1>
<s2>581 83 Linkoping</s2>
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<author><name sortKey="Olof Holtz, Per" uniqKey="Olof Holtz P">Per Olof Holtz</name>
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<author><name sortKey="Schoenfeld, Winston V" uniqKey="Schoenfeld W">Winston V. Schoenfeld</name>
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<country>États-Unis</country>
<wicri:noRegion>Santa Barbara, California 93106</wicri:noRegion>
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<author><name sortKey="Petroff, Pierre M" uniqKey="Petroff P">Pierre M. Petroff</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Materials Department, University of California</s1>
<s2>Santa Barbara, California 93106</s2>
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<term>Indium arsenides</term>
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<term>Composé III-V</term>
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<term>Mouillabilité</term>
<term>Effet champ électrique</term>
<term>Champ extérieur</term>
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<term>GaAs</term>
<term>7867</term>
<term>8107T</term>
<term>8535B</term>
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<front><div type="abstract" xml:lang="en">We report on magneto-photoluminescence studies of InAs/GaAs quantum dots (QDs) of considerably different densities, from dense ensembles down to individual dots. It is found that a magnetic field applied in Faraday geometry decreases the photoluminescence (PL) intensity of QD ensembles, which is not accompanied by the corresponding increase of PL signal of the wetting layer on which QDs are grown. The model suggested to explain these data assumes considerably different strengths of suppression of electron and hole fluxes by a magnetic field. This idea has been successfully checked in experiments on individual QDs, where the PL spectra allow to directly monitor the charge state of a QD and, hence, to conclude about relative magnitudes of electron and hole fluxes toward the QD. Comparative studies of different individual QDs have revealed that the internal electric field in the sample (which was altered in the experiments in a controllable way) together with an external magnetic field will determine the charge state and emission intensity of the QDs.</div>
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   |texte=   Comparative Magneto-Photoluminescence Study of Ensembles and of Individual InAs Quantum Dots
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Comparative Magneto-Photoluminescence Study of Ensembles and of Individual InAs Quantum Dots

Comparative Magneto-Photoluminescence Study of Ensembles and of Individual InAs Quantum Dots

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri