Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
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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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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1808128235597201408 |