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Fine structure splitting and biexciton binding energy in single self-assembled InAs/AlAs quantum dots

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Fine structure splitting and biexciton binding energy in single self-assembled InAs/AlAs quantum dots

Auteurs : RBID : Pascal:06-0293175

Descripteurs français

Pascal (Inist)
- Structure fine, Biexciton, Energie liaison, Décomposition niveau énergie, Photoluminescence, Exciton, Polarisation rectiligne, Anisotropie, Indium arséniure, Aluminium arséniure, Point quantique, Semiconducteur III-V, InAs, AlAs, 7867H, 7321L.

English descriptors

KwdEn :
- Aluminium arsenides, Anisotropy, Biexcitons, Binding energy, Energy-level splitting, Excitons, Fine structure, III-V semiconductors, Indium arsenides, Linear polarization, Photoluminescence, Quantum dots.

Abstract

We report on photoluminescence investigations of individual InAs quantum dots embedded in an AlAs matrix which emit in the visible region, in contrast to the more traditional InAs/GaAs system. Biexciton binding energies, considerably larger than for InAs/GaAs dots, up to 9meV are observed. The biexciton binding energy decreases with decreasing dot size, reflecting a possible crossover to an antibinding regime. Exciton and biexciton emission consists of linearly cross polarized doublets due to a large fine structure splitting up to 0.3 meV of the bright exciton state. With increasing exciton transition energy the fine structure splitting decreases down to zero at about 1.63eV. Differences with InAs/GaAs QDs may be attributed to major dot shape anisotropy and/or larger confinement due to higher AlAs barriers.

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Pascal:06-0293175

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<author><name sortKey="Sarkar, D" uniqKey="Sarkar D">D. Sarkar</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Departamento de Fisica de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
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<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Communauté de Madrid</region>
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<orgName type="university">Université autonome de Madrid</orgName>
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</author>
<author><name sortKey="Van Der Meulen, H P" uniqKey="Van Der Meulen H">H. P. Van Der Meulen</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Departamento de Fisica de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Communauté de Madrid</region>
</placeName>
<orgName type="university">Université autonome de Madrid</orgName>
</affiliation>
</author>
<author><name sortKey="Calleja, J M" uniqKey="Calleja J">J. M. Calleja</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Departamento de Fisica de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
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<author><name sortKey="Becker, J M" uniqKey="Becker J">J. M. Becker</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut fur Festkôrperphysik, Unirersität Hannover</s1>
<s2>30167 Hannover</s2>
<s3>DEU</s3>
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<country>Allemagne</country>
<placeName><region type="land" nuts="2">Basse-Saxe</region>
<settlement type="city">Hanovre</settlement>
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<author><name sortKey="Haug, R J" uniqKey="Haug R">R. J. Haug</name>
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<s2>30167 Hannover</s2>
<s3>DEU</s3>
<sZ>4 aut.</sZ>
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<country>Allemagne</country>
<placeName><region type="land" nuts="2">Basse-Saxe</region>
<settlement type="city">Hanovre</settlement>
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</author>
<author><name sortKey="Pierz, K" uniqKey="Pierz K">K. Pierz</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Physikalisch-Technische Bundesanstalt Braunschweig</s1>
<s2>38116 Braunschweig</s2>
<s3>DEU</s3>
<sZ>6 aut.</sZ>
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<country>Allemagne</country>
<wicri:noRegion>38116 Braunschweig</wicri:noRegion>
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<wicri:noRegion>Physikalisch-Technische Bundesanstalt Braunschweig</wicri:noRegion>
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<date when="2006">2006</date>
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<seriesStmt><idno type="ISSN">1386-9477</idno>
<title level="j" type="abbreviated">Physica ( E) low-dimens.  syst.  nanostrut.</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium arsenides</term>
<term>Anisotropy</term>
<term>Biexcitons</term>
<term>Binding energy</term>
<term>Energy-level splitting</term>
<term>Excitons</term>
<term>Fine structure</term>
<term>III-V semiconductors</term>
<term>Indium arsenides</term>
<term>Linear polarization</term>
<term>Photoluminescence</term>
<term>Quantum dots</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Structure fine</term>
<term>Biexciton</term>
<term>Energie liaison</term>
<term>Décomposition niveau énergie</term>
<term>Photoluminescence</term>
<term>Exciton</term>
<term>Polarisation rectiligne</term>
<term>Anisotropie</term>
<term>Indium arséniure</term>
<term>Aluminium arséniure</term>
<term>Point quantique</term>
<term>Semiconducteur III-V</term>
<term>InAs</term>
<term>AlAs</term>
<term>7867H</term>
<term>7321L</term>
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<front><div type="abstract" xml:lang="en">We report on photoluminescence investigations of individual InAs quantum dots embedded in an AlAs matrix which emit in the visible region, in contrast to the more traditional InAs/GaAs system. Biexciton binding energies, considerably larger than for InAs/GaAs dots, up to 9meV are observed. The biexciton binding energy decreases with decreasing dot size, reflecting a possible crossover to an antibinding regime. Exciton and biexciton emission consists of linearly cross polarized doublets due to a large fine structure splitting up to 0.3 meV of the bright exciton state. With increasing exciton transition energy the fine structure splitting decreases down to zero at about 1.63eV. Differences with InAs/GaAs QDs may be attributed to major dot shape anisotropy and/or larger confinement due to higher AlAs barriers.</div>
</front>
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<sZ>4 aut.</sZ>
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Fine structure splitting and biexciton binding energy in single self-assembled InAs/AlAs quantum dots

Fine structure splitting and biexciton binding energy in single self-assembled InAs/AlAs 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