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Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

Identifieur interne : 005E92 ( Main/Repository ); précédent : 005E91; suivant : 005E93

Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

Auteurs : RBID : Pascal:08-0349337

Descripteurs français

Pascal (Inist)
- Diffusion mutuelle, Spectre excitation, Autoorganisation, Phonon optique, Polarisation, Structure fine, Décomposition niveau énergie, Exciton, Photoluminescence, Arséniure d'indium, Arséniure d'aluminium, Point quantique, InAs, AlAs.

English descriptors

KwdEn :
- Aluminium arsenides, Energy-level splitting, Excitation spectrum, Excitons, Fine structure, Indium arsenides, Interdiffusion, Optical phonons, Photoluminescence, Polarization, Quantum dots, Self organization.

Abstract

The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the "InAs-like" and "AlAs-like" optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.

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Pascal:08-0349337

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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Resonant optical excitation and intermixing in InAs/AlAs single quantum dots</title>
<author><name sortKey="Sarkar, D" uniqKey="Sarkar D">D. Sarkar</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Departamento de Física de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<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 Física de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 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="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 Física de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 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="Meyer, J M" uniqKey="Meyer J">J. M. Meyer</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut für Festkorperphysik, Leibniz Universität Hannover</s1>
<s2>30167 Hannover</s2>
<s3>DEU</s3>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<placeName><region type="land" nuts="2">Basse-Saxe</region>
<settlement type="city">Hanovre</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Haug, R J" uniqKey="Haug R">R. J. Haug</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut für Festkorperphysik, Leibniz Universität Hannover</s1>
<s2>30167 Hannover</s2>
<s3>DEU</s3>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
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<country>Allemagne</country>
<placeName><region type="land" nuts="2">Basse-Saxe</region>
<settlement type="city">Hanovre</settlement>
</placeName>
</affiliation>
</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>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>38116 Braunschweig</wicri:noRegion>
<wicri:noRegion>Physikalisch-Technische Bundesanstalt Braunschweig</wicri:noRegion>
<wicri:noRegion>Physikalisch-Technische Bundesanstalt Braunschweig</wicri:noRegion>
</affiliation>
</author>
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<publicationStmt><idno type="inist">08-0349337</idno>
<date when="2008">2008</date>
<idno type="stanalyst">PASCAL 08-0349337 INIST</idno>
<idno type="RBID">Pascal:08-0349337</idno>
<idno type="wicri:Area/Main/Corpus">006721</idno>
<idno type="wicri:Area/Main/Repository">005E92</idno>
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<seriesStmt><idno type="ISSN">1386-9477</idno>
<title level="j" type="abbreviated">Physica ( E) low-dimens.  syst.  nanostrut.</title>
<title level="j" type="main">Physica. E, low-dimentional systems and nanostructures</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium arsenides</term>
<term>Energy-level splitting</term>
<term>Excitation spectrum</term>
<term>Excitons</term>
<term>Fine structure</term>
<term>Indium arsenides</term>
<term>Interdiffusion</term>
<term>Optical phonons</term>
<term>Photoluminescence</term>
<term>Polarization</term>
<term>Quantum dots</term>
<term>Self organization</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Diffusion mutuelle</term>
<term>Spectre excitation</term>
<term>Autoorganisation</term>
<term>Phonon optique</term>
<term>Polarisation</term>
<term>Structure fine</term>
<term>Décomposition niveau énergie</term>
<term>Exciton</term>
<term>Photoluminescence</term>
<term>Arséniure d'indium</term>
<term>Arséniure d'aluminium</term>
<term>Point quantique</term>
<term>InAs</term>
<term>AlAs</term>
</keywords>
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<front><div type="abstract" xml:lang="en">The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the "InAs-like" and "AlAs-like" optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.</div>
</front>
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<fA09 i1="01" i2="1" l="ENG"><s1>Proceedings of the 13th International Conference on Modulated Semiconductor Structures (MSS-13)</s1>
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<fA11 i1="01" i2="1"><s1>SARKAR (D.)</s1>
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<fA11 i1="05" i2="1"><s1>HAUG (R. J.)</s1>
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<s9>ed.</s9>
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<fA12 i1="02" i2="1"><s1>SORBA (L.)</s1>
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<fA14 i1="01"><s1>Departamento de Física de Materiales, Universidad Autónoma de Madrid</s1>
<s2>28049 Madrid</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
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<fA14 i1="02"><s1>Institut für Festkorperphysik, Leibniz Universität Hannover</s1>
<s2>30167 Hannover</s2>
<s3>DEU</s3>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Physikalisch-Technische Bundesanstalt Braunschweig</s1>
<s2>38116 Braunschweig</s2>
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<sZ>6 aut.</sZ>
</fA14>
<fA15 i1="01"><s1>INFM, University of Modena and Reggio Emilia, National Research Center on Nanostructures and Biosystems at Surfaces</s1>
<s2>Modena</s2>
<s3>ITA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<fC01 i1="01" l="ENG"><s0>The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the "InAs-like" and "AlAs-like" optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.</s0>
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<fC02 i1="02" i2="3"><s0>001B70C21L</s0>
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<fC03 i1="01" i2="X" l="FRE"><s0>Diffusion mutuelle</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Interdiffusion</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Difusión mútua</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Spectre excitation</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Excitation spectrum</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Espectro excitación</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Autoorganisation</s0>
<s5>04</s5>
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<fC03 i1="03" i2="X" l="ENG"><s0>Self organization</s0>
<s5>04</s5>
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<fC03 i1="03" i2="X" l="SPA"><s0>Autoorganización</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Phonon optique</s0>
<s5>06</s5>
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<s5>06</s5>
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<fC03 i1="05" i2="3" l="FRE"><s0>Polarisation</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Polarization</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Structure fine</s0>
<s5>08</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Fine structure</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Décomposition niveau énergie</s0>
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<fC03 i1="10" i2="3" l="FRE"><s0>Arséniure d'indium</s0>
<s2>NK</s2>
<s5>15</s5>
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<fC03 i1="10" i2="3" l="ENG"><s0>Indium arsenides</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Arséniure d'aluminium</s0>
<s2>NK</s2>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Aluminium arsenides</s0>
<s2>NK</s2>
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<fC03 i1="12" i2="3" l="FRE"><s0>Point quantique</s0>
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</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Quantum dots</s0>
<s5>17</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>InAs</s0>
<s4>INC</s4>
<s5>52</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>AlAs</s0>
<s4>INC</s4>
<s5>53</s5>
</fC03>
<fN21><s1>217</s1>
</fN21>
</pA>
<pR><fA30 i1="01" i2="1" l="ENG"><s1>International Conference on Modulated Semiconductor Structures (MSS-13)</s1>
<s2>13</s2>
<s3>Genova ITA</s3>
<s4>2007-07-15</s4>
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Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

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Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri