Cargando…
Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we repo...
Autores principales: | , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2014
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926008/ https://www.ncbi.nlm.nih.gov/pubmed/24500329 http://dx.doi.org/10.1038/ncomms4268 |
_version_ | 1782303932006006784 |
---|---|
author | Sallen, G. Kunz, S. Amand, T. Bouet, L. Kuroda, T. Mano, T. Paget, D. Krebs, O. Marie, X. Sakoda, K. Urbaszek, B. |
author_facet | Sallen, G. Kunz, S. Amand, T. Bouet, L. Kuroda, T. Mano, T. Paget, D. Krebs, O. Marie, X. Sakoda, K. Urbaszek, B. |
author_sort | Sallen, G. |
collection | PubMed |
description | Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain-free GaAs quantum dots. The strong interaction of a single, optically injected electron spin with the nuclear spins acts as a stabilizing, effective magnetic field (Knight field) on the nuclei. We optically tune the Knight field amplitude and direction. In combination with a small transverse magnetic field, we are able to control the longitudinal and transverse components of the nuclear spin polarization in the absence of lattice strain—that is, in dots with strongly reduced static nuclear quadrupole effects, as reproduced by our model calculations. |
format | Online Article Text |
id | pubmed-3926008 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-39260082014-02-21 Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field Sallen, G. Kunz, S. Amand, T. Bouet, L. Kuroda, T. Mano, T. Paget, D. Krebs, O. Marie, X. Sakoda, K. Urbaszek, B. Nat Commun Article Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain-free GaAs quantum dots. The strong interaction of a single, optically injected electron spin with the nuclear spins acts as a stabilizing, effective magnetic field (Knight field) on the nuclei. We optically tune the Knight field amplitude and direction. In combination with a small transverse magnetic field, we are able to control the longitudinal and transverse components of the nuclear spin polarization in the absence of lattice strain—that is, in dots with strongly reduced static nuclear quadrupole effects, as reproduced by our model calculations. Nature Pub. Group 2014-02-06 /pmc/articles/PMC3926008/ /pubmed/24500329 http://dx.doi.org/10.1038/ncomms4268 Text en Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Sallen, G. Kunz, S. Amand, T. Bouet, L. Kuroda, T. Mano, T. Paget, D. Krebs, O. Marie, X. Sakoda, K. Urbaszek, B. Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title | Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title_full | Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title_fullStr | Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title_full_unstemmed | Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title_short | Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
title_sort | nuclear magnetization in gallium arsenide quantum dots at zero magnetic field |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926008/ https://www.ncbi.nlm.nih.gov/pubmed/24500329 http://dx.doi.org/10.1038/ncomms4268 |
work_keys_str_mv | AT salleng nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT kunzs nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT amandt nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT bouetl nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT kurodat nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT manot nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT pagetd nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT krebso nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT mariex nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT sakodak nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield AT urbaszekb nuclearmagnetizationingalliumarsenidequantumdotsatzeromagneticfield |