Circular polarization in a non-magnetic resonant tunneling device

Circular polarization in a non-magnetic resonant tunneling device

<p>Abstract</p> <p>We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric <it>n</it>-type GaAs/AlAs/GaAlAs resonant tunneling diode under magnetic field parallel to the tunnel current. The quantum well (QW) PL presents strong circular pol...

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Main Authors: Airey Robert, Brasil Maria, Henini Mohamed, Orlita Milan, Kunc Jan, Maude Duncan, dos Santos Lara, Gobato Yara, Teodoro M&#225;rcio, Lopez-Richard Victor, Marques Gilmar
Format: Article
Language:English
Published: SpringerOpen 2011-01-01
Series:Nanoscale Research Letters
Online Access:http://www.nanoscalereslett.com/content/6/1/101
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spelling doaj-44a17e6012e548bebb76359e306c82f22020-11-25T02:43:08ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161101Circular polarization in a non-magnetic resonant tunneling deviceAirey RobertBrasil MariaHenini MohamedOrlita MilanKunc JanMaude Duncandos Santos LaraGobato YaraTeodoro M&#225;rcioLopez-Richard VictorMarques Gilmar<p>Abstract</p> <p>We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric <it>n</it>-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 <it>g</it>-factors of the different layers, the density of carriers along the structure, and the Zeeman and Rashba effects.</p> http://www.nanoscalereslett.com/content/6/1/101
collection DOAJ
language English
format Article
sources DOAJ
author Airey Robert
Brasil Maria
Henini Mohamed
Orlita Milan
Kunc Jan
Maude Duncan
dos Santos Lara
Gobato Yara
Teodoro M&#225;rcio
Lopez-Richard Victor
Marques Gilmar
spellingShingle Airey Robert
Brasil Maria
Henini Mohamed
Orlita Milan
Kunc Jan
Maude Duncan
dos Santos Lara
Gobato Yara
Teodoro M&#225;rcio
Lopez-Richard Victor
Marques Gilmar
Circular polarization in a non-magnetic resonant tunneling device
Nanoscale Research Letters
author_facet Airey Robert
Brasil Maria
Henini Mohamed
Orlita Milan
Kunc Jan
Maude Duncan
dos Santos Lara
Gobato Yara
Teodoro M&#225;rcio
Lopez-Richard Victor
Marques Gilmar
author_sort Airey Robert
title Circular polarization in a non-magnetic resonant tunneling device
title_short 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_sort circular polarization in a non-magnetic resonant tunneling device
publisher SpringerOpen
series Nanoscale Research Letters
issn 1931-7573
1556-276X
publishDate 2011-01-01
description <p>Abstract</p> <p>We have investigated the polarization-resolved photoluminescence (PL) in an asymmetric <it>n</it>-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 <it>g</it>-factors of the different layers, the density of carriers along the structure, and the Zeeman and Rashba effects.</p>
url http://www.nanoscalereslett.com/content/6/1/101
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AT brasilmaria circularpolarizationinanonmagneticresonanttunnelingdevice
AT heninimohamed circularpolarizationinanonmagneticresonanttunnelingdevice
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AT kuncjan circularpolarizationinanonmagneticresonanttunnelingdevice
AT maudeduncan circularpolarizationinanonmagneticresonanttunnelingdevice
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