Spin Dynamics of Electrons and Holes in p-Doped InAs/GaAs Quantum Dots

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Main Author:	P.-F. Braun
Format:	Artículo científico
Language:	en
Published:	Sociedade Brasileira de Física 2006
Subjects:	Física, Astronomía y Matemáticas InAs Spin dynamics GaAs quantum dots Time resolved photoluminescence
Online Access:	Acceder al recurso
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_version_	1866558092741705728
author	P.-F. Braun
author_facet	P.-F. Braun
contents	Spin Dynamics of Electrons and Holes in p-Doped InAs/GaAs Quantum Dots P.-F. Braun L. Lombez X. Marie B. Urbaszek T. Amand P. Renucci J.-L. Gauffier V.K. Kalevich K.V. Kavokin O. Krebs P. Voisin Física, Astronomía y Matemáticas InAs Spin dynamics GaAs quantum dots Time resolved photoluminescence We have investigated the electron and hole spin dynamics in p-doped semiconductor InAs/GaAs quantumdots by time resolved photoluminescence. We observe a decay of the average electron spin polarisation downto 1/3 of its initial value with a characteristic time of TD ¼ 500ps. We attribute this decay to the hyperfineinteraction of the electron spin with randomly orientated nuclear spins. Magnetic field dependent studies revealthat this efficient spin relaxation mechanism can be suppressed by a field of the order of 100mT. In pump-probelike experiments we demonstrate that the resident hole spin, written with a first pulse, remains stable longenough to be read 15ns later with a second pulse. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436367 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.36
format	Artículo científico
id	redalyc_46436367
language	en
publishDate	2006
publisher	Sociedade Brasileira de Física
spellingShingle	Spin Dynamics of Electrons and Holes in p-Doped InAs/GaAs Quantum Dots P.-F. Braun Física, Astronomía y Matemáticas InAs Spin dynamics GaAs quantum dots Time resolved photoluminescence Spin Dynamics of Electrons and Holes in p-Doped InAs/GaAs Quantum Dots P.-F. Braun L. Lombez X. Marie B. Urbaszek T. Amand P. Renucci J.-L. Gauffier V.K. Kalevich K.V. Kavokin O. Krebs P. Voisin Física, Astronomía y Matemáticas InAs Spin dynamics GaAs quantum dots Time resolved photoluminescence We have investigated the electron and hole spin dynamics in p-doped semiconductor InAs/GaAs quantumdots by time resolved photoluminescence. We observe a decay of the average electron spin polarisation downto 1/3 of its initial value with a characteristic time of TD ¼ 500ps. We attribute this decay to the hyperfineinteraction of the electron spin with randomly orientated nuclear spins. Magnetic field dependent studies revealthat this efficient spin relaxation mechanism can be suppressed by a field of the order of 100mT. In pump-probelike experiments we demonstrate that the resident hole spin, written with a first pulse, remains stable longenough to be read 15ns later with a second pulse. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436367 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.36
title	Spin Dynamics of Electrons and Holes in p-Doped InAs/GaAs Quantum Dots
topic	Física, Astronomía y Matemáticas InAs Spin dynamics GaAs quantum dots Time resolved photoluminescence
url	https://www.redalyc.org/articulo.oa?id=46436367

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