Circular polarization in a non-magnetic resonant tunneling device

We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric n-type GaAs/AlAs/GaAlAs resonant tunneling diode under magnetic field parallel to the tunnel current. The quantum well (QW) PL presents strong circular polarization (values up to -70% at 19 T). The optical emissio...

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Autores principales: dos Santos, Lara F, Gobato, Yara Galvão, Teodoro, Márcio D, Lopez-Richard, Victor, Marques, Gilmar E, Brasil, Maria JSP, Orlita, Milan, Kunc, Jan, Maude, Duncan K, Henini, Mohamed, Airey, Robert J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2011
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211145/
https://www.ncbi.nlm.nih.gov/pubmed/21711613
http://dx.doi.org/10.1186/1556-276X-6-101
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author dos Santos, Lara F
Gobato, Yara Galvão
Teodoro, Márcio D
Lopez-Richard, Victor
Marques, Gilmar E
Brasil, Maria JSP
Orlita, Milan
Kunc, Jan
Maude, Duncan K
Henini, Mohamed
Airey, Robert J
author_facet dos Santos, Lara F
Gobato, Yara Galvão
Teodoro, Márcio D
Lopez-Richard, Victor
Marques, Gilmar E
Brasil, Maria JSP
Orlita, Milan
Kunc, Jan
Maude, Duncan K
Henini, Mohamed
Airey, Robert J
author_sort dos Santos, Lara F
collection PubMed
description We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric n-type GaAs/AlAs/GaAlAs resonant tunneling diode under magnetic field parallel to the tunnel current. The quantum well (QW) PL presents strong circular polarization (values up to -70% at 19 T). The optical emission from GaAs contact layers shows evidence of highly spin-polarized two-dimensional electron and hole gases which affects the spin polarization of carriers in the QW. However, the circular polarization degree in the QW also depends on various other parameters, including the g-factors of the different layers, the density of carriers along the structure, and the Zeeman and Rashba effects.
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spelling pubmed-32111452011-11-09 Circular polarization in a non-magnetic resonant tunneling device dos Santos, Lara F Gobato, Yara Galvão Teodoro, Márcio D Lopez-Richard, Victor Marques, Gilmar E Brasil, Maria JSP Orlita, Milan Kunc, Jan Maude, Duncan K Henini, Mohamed Airey, Robert J Nanoscale Res Lett Nano Express We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric n-type GaAs/AlAs/GaAlAs resonant tunneling diode under magnetic field parallel to the tunnel current. The quantum well (QW) PL presents strong circular polarization (values up to -70% at 19 T). The optical emission from GaAs contact layers shows evidence of highly spin-polarized two-dimensional electron and hole gases which affects the spin polarization of carriers in the QW. However, the circular polarization degree in the QW also depends on various other parameters, including the g-factors of the different layers, the density of carriers along the structure, and the Zeeman and Rashba effects. Springer 2011-01-25 /pmc/articles/PMC3211145/ /pubmed/21711613 http://dx.doi.org/10.1186/1556-276X-6-101 Text en Copyright ©2011 dos Santos et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
dos Santos, Lara F
Gobato, Yara Galvão
Teodoro, Márcio D
Lopez-Richard, Victor
Marques, Gilmar E
Brasil, Maria JSP
Orlita, Milan
Kunc, Jan
Maude, Duncan K
Henini, Mohamed
Airey, Robert J
Circular polarization in a non-magnetic resonant tunneling device
title Circular polarization in a non-magnetic resonant tunneling device
title_full Circular polarization in a non-magnetic resonant tunneling device
title_fullStr Circular polarization in a non-magnetic resonant tunneling device
title_full_unstemmed Circular polarization in a non-magnetic resonant tunneling device
title_short Circular polarization in a non-magnetic resonant tunneling device
title_sort circular polarization in a non-magnetic resonant tunneling device
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211145/
https://www.ncbi.nlm.nih.gov/pubmed/21711613
http://dx.doi.org/10.1186/1556-276X-6-101
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