Comparative magneto-photoluminescence study of ensembles and of individual InAs quantum dots.
Identifieur interne : 001F91 ( Main/Exploration ); précédent : 001F90; suivant : 001F92Comparative magneto-photoluminescence study of ensembles and of individual InAs quantum dots.
Auteurs : RBID : pubmed:19072126English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Arsenicals, Indium.
- chemistry : Nanostructures.
- methods : Crystallization, Luminescent Measurements, Nanotechnology.
- ultrastructure : Nanostructures.
- Computer Simulation, Magnetics, Models, Chemical, Particle Size, Quantum Dots.
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.
DOI: 10.1021/nl803148q
PubMed: 19072126
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Comparative magneto-photoluminescence study of ensembles and of individual InAs quantum dots.</title><author><name sortKey="Moskalenko, Evgenii S" uniqKey="Moskalenko E">Evgenii S Moskalenko</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics, Chemistry and Biology (IFM), Linkoping University, S-581 83 Linkoping, Sweden, A. F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St. Petersburg, Russia.</nlm:affiliation><country xml:lang="fr">Russie</country><wicri:regionArea>Department of Physics, Chemistry and Biology (IFM), Linkoping University, S-581 83 Linkoping, Sweden, A. F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St. Petersburg</wicri:regionArea></affiliation></author><author><name sortKey="Larsson, L Arvid" uniqKey="Larsson L">L Arvid Larsson</name></author><author><name sortKey="Larsson, Mats" uniqKey="Larsson M">Mats Larsson</name></author><author><name sortKey="Holtz, Per Olof" uniqKey="Holtz P">Per Olof Holtz</name></author><author><name sortKey="Schoenfeld, Winston V" uniqKey="Schoenfeld W">Winston V Schoenfeld</name></author><author><name sortKey="Petroff, Pierre M" uniqKey="Petroff P">Pierre M Petroff</name></author></titleStmt><publicationStmt><date when="2009">2009</date><idno type="doi">10.1021/nl803148q</idno><idno type="RBID">pubmed:19072126</idno><idno type="pmid">19072126</idno><idno type="wicri:Area/Main/Corpus">002102</idno><idno type="wicri:Area/Main/Curation">002102</idno><idno type="wicri:Area/Main/Exploration">001F91</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arsenicals (chemistry)</term><term>Computer Simulation</term><term>Crystallization (methods)</term><term>Indium (chemistry)</term><term>Luminescent Measurements (methods)</term><term>Magnetics</term><term>Models, Chemical</term><term>Nanostructures (chemistry)</term><term>Nanostructures (ultrastructure)</term><term>Nanotechnology (methods)</term><term>Particle Size</term><term>Quantum Dots</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Arsenicals</term><term>Indium</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Nanostructures</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Crystallization</term><term>Luminescent Measurements</term><term>Nanotechnology</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Nanostructures</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Computer Simulation</term><term>Magnetics</term><term>Models, Chemical</term><term>Particle Size</term><term>Quantum Dots</term></keywords></textClass></profileDesc></teiHeader><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></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">19072126</PMID><DateCreated><Year>2009</Year><Month>01</Month><Day>15</Day></DateCreated><DateCompleted><Year>2009</Year><Month>03</Month><Day>30</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1530-6984</ISSN><JournalIssue CitedMedium="Print"><Volume>9</Volume><Issue>1</Issue><PubDate><Year>2009</Year><Month>Jan</Month></PubDate></JournalIssue><Title>Nano letters</Title><ISOAbbreviation>Nano Lett.</ISOAbbreviation></Journal><ArticleTitle>Comparative magneto-photoluminescence study of ensembles and of individual InAs quantum dots.</ArticleTitle><Pagination><MedlinePgn>353-9</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1021/nl803148q</ELocationID><Abstract><AbstractText>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.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Moskalenko</LastName><ForeName>Evgenii S</ForeName><Initials>ES</Initials><Affiliation>Department of Physics, Chemistry and Biology (IFM), Linkoping University, S-581 83 Linkoping, Sweden, A. F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St. Petersburg, Russia.</Affiliation></Author><Author ValidYN="Y"><LastName>Larsson</LastName><ForeName>L Arvid</ForeName><Initials>LA</Initials></Author><Author ValidYN="Y"><LastName>Larsson</LastName><ForeName>Mats</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Holtz</LastName><ForeName>Per Olof</ForeName><Initials>PO</Initials></Author><Author ValidYN="Y"><LastName>Schoenfeld</LastName><ForeName>Winston V</ForeName><Initials>WV</Initials></Author><Author ValidYN="Y"><LastName>Petroff</LastName><ForeName>Pierre M</ForeName><Initials>PM</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Comparative Study</PublicationType><PublicationType>Evaluation Studies</PublicationType><PublicationType>Journal Article</PublicationType><PublicationType>Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Nano Lett</MedlineTA><NlmUniqueID>101088070</NlmUniqueID><ISSNLinking>1530-6984</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Arsenicals</NameOfSubstance></Chemical><Chemical><RegistryNumber>045A6V3VFX</RegistryNumber><NameOfSubstance>Indium</NameOfSubstance></Chemical><Chemical><RegistryNumber>1303-11-3</RegistryNumber><NameOfSubstance>indium arsenide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N">Arsenicals</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Computer Simulation</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Crystallization</DescriptorName><QualifierName MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Indium</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Luminescent Measurements</DescriptorName><QualifierName MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Magnetics</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y">Models, Chemical</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Nanostructures</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName><QualifierName MajorTopicYN="N">ultrastructure</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Nanotechnology</DescriptorName><QualifierName MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Particle Size</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y">Quantum Dots</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2008</Year><Month>12</Month><Day>17</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2008</Year><Month>12</Month><Day>17</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>3</Month><Day>31</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1021/nl803148q</ArticleId><ArticleId IdType="pii">10.1021/nl803148q</ArticleId><ArticleId IdType="pubmed">19072126</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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