Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells

Detalhes bibliográficos
Autor(a) principal: Tabata, Américo Sheitiro [UNESP]
Data de Publicação: 2010
Outros Autores: Oliveira, José Brás Barreto de [UNESP], Da Silva, E. C F, Lamas, T. E., Duarte, C. A., Gusev, G. M.
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1088/1742-6596/210/1/012052
http://hdl.handle.net/11449/71652
Resumo: In this work the electronic structure of undoped AlGaAs/GaAs wide parabolic quantum wells (PQWs) with different well widths (1000 and 3000 ) were investigated by means of photoluminescence (PL) measurements. Due to the particular potential shape, the sample structure confines photocreated carriers with almost three-dimensional characteristics. Our data show that depending on the well width thickness it is possible to observe very narrow structures in the PL spectra, which were ascribed to emissions associated to the recombination of confined 1s-excitons of the parabolic potential wells. From our measurements, the exciton binding energies (of a few meV) were estimated. Besides the exciton emission, we have also observed PL emissions associated to electrons in the excited subbands of the PQWs. © 2010 IOP Publishing Ltd.
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spelling Excitons in undoped AlGaAs/GaAs wide parabolic quantum wellsAlGaAs/GaAsExciton emissionExciton-binding energyParabolic potentialParabolic quantum wellsPhotoluminescence measurementsPL emissionPL spectraSample structureSub-bandsThree-dimensional characteristicsWell widthBinding energyElectronic structureExcitonsThree dimensionalSemiconductor quantum wellsIn this work the electronic structure of undoped AlGaAs/GaAs wide parabolic quantum wells (PQWs) with different well widths (1000 and 3000 ) were investigated by means of photoluminescence (PL) measurements. Due to the particular potential shape, the sample structure confines photocreated carriers with almost three-dimensional characteristics. Our data show that depending on the well width thickness it is possible to observe very narrow structures in the PL spectra, which were ascribed to emissions associated to the recombination of confined 1s-excitons of the parabolic potential wells. From our measurements, the exciton binding energies (of a few meV) were estimated. Besides the exciton emission, we have also observed PL emissions associated to electrons in the excited subbands of the PQWs. © 2010 IOP Publishing Ltd.Departamento de Física Universidade Estadual Paulista, 17033-360 BauruInstituto de Física Universidade de so Paulo, 05315-970, So PauloDepartamento de Física Universidade Estadual Paulista, 17033-360 BauruUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Tabata, Américo Sheitiro [UNESP]Oliveira, José Brás Barreto de [UNESP]Da Silva, E. C FLamas, T. E.Duarte, C. A.Gusev, G. M.2014-05-27T11:24:40Z2014-05-27T11:24:40Z2010-04-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectapplication/pdfhttp://dx.doi.org/10.1088/1742-6596/210/1/012052Journal of Physics: Conference Series, v. 210.1742-65881742-6596http://hdl.handle.net/11449/7165210.1088/1742-6596/210/1/012052WOS:0002897158002642-s2.0-77950480399WOS000289715800264.pdf93540646206436116977466698742311Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Physics: Conference Series0,2410,241info:eu-repo/semantics/openAccess2024-04-25T17:40:55Zoai:repositorio.unesp.br:11449/71652Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:26:03.186892Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
title Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
spellingShingle Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
Tabata, Américo Sheitiro [UNESP]
AlGaAs/GaAs
Exciton emission
Exciton-binding energy
Parabolic potential
Parabolic quantum wells
Photoluminescence measurements
PL emission
PL spectra
Sample structure
Sub-bands
Three-dimensional characteristics
Well width
Binding energy
Electronic structure
Excitons
Three dimensional
Semiconductor quantum wells
title_short Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
title_full Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
title_fullStr Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
title_full_unstemmed Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
title_sort Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
author Tabata, Américo Sheitiro [UNESP]
author_facet Tabata, Américo Sheitiro [UNESP]
Oliveira, José Brás Barreto de [UNESP]
Da Silva, E. C F
Lamas, T. E.
Duarte, C. A.
Gusev, G. M.
author_role author
author2 Oliveira, José Brás Barreto de [UNESP]
Da Silva, E. C F
Lamas, T. E.
Duarte, C. A.
Gusev, G. M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Tabata, Américo Sheitiro [UNESP]
Oliveira, José Brás Barreto de [UNESP]
Da Silva, E. C F
Lamas, T. E.
Duarte, C. A.
Gusev, G. M.
dc.subject.por.fl_str_mv AlGaAs/GaAs
Exciton emission
Exciton-binding energy
Parabolic potential
Parabolic quantum wells
Photoluminescence measurements
PL emission
PL spectra
Sample structure
Sub-bands
Three-dimensional characteristics
Well width
Binding energy
Electronic structure
Excitons
Three dimensional
Semiconductor quantum wells
topic AlGaAs/GaAs
Exciton emission
Exciton-binding energy
Parabolic potential
Parabolic quantum wells
Photoluminescence measurements
PL emission
PL spectra
Sample structure
Sub-bands
Three-dimensional characteristics
Well width
Binding energy
Electronic structure
Excitons
Three dimensional
Semiconductor quantum wells
description In this work the electronic structure of undoped AlGaAs/GaAs wide parabolic quantum wells (PQWs) with different well widths (1000 and 3000 ) were investigated by means of photoluminescence (PL) measurements. Due to the particular potential shape, the sample structure confines photocreated carriers with almost three-dimensional characteristics. Our data show that depending on the well width thickness it is possible to observe very narrow structures in the PL spectra, which were ascribed to emissions associated to the recombination of confined 1s-excitons of the parabolic potential wells. From our measurements, the exciton binding energies (of a few meV) were estimated. Besides the exciton emission, we have also observed PL emissions associated to electrons in the excited subbands of the PQWs. © 2010 IOP Publishing Ltd.
publishDate 2010
dc.date.none.fl_str_mv 2010-04-12
2014-05-27T11:24:40Z
2014-05-27T11:24:40Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1088/1742-6596/210/1/012052
Journal of Physics: Conference Series, v. 210.
1742-6588
1742-6596
http://hdl.handle.net/11449/71652
10.1088/1742-6596/210/1/012052
WOS:000289715800264
2-s2.0-77950480399
WOS000289715800264.pdf
9354064620643611
6977466698742311
url http://dx.doi.org/10.1088/1742-6596/210/1/012052
http://hdl.handle.net/11449/71652
identifier_str_mv Journal of Physics: Conference Series, v. 210.
1742-6588
1742-6596
10.1088/1742-6596/210/1/012052
WOS:000289715800264
2-s2.0-77950480399
WOS000289715800264.pdf
9354064620643611
6977466698742311
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Physics: Conference Series
0,241
0,241
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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