Influence of light on spin diffusion in weak magnetic fields

J. -H. Quast; G. V. Astakhov; W. Ossau; L. W. Molenkamp; J. Heinrich; Sven Höfling; A. Forchel

doi:10.1103/PhysRevB.79.245207

Influence of light on spin diffusion in weak magnetic fields

J. -H. Quast^*, G. V. Astakhov, W. Ossau, L. W. Molenkamp, J. Heinrich, Sven Höfling, A. Forchel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrate that optical illumination strongly influences spin transport in n-type GaAs. Specifically, increasing the power density of optical spin pumping results in a significant expansion of the spin-diffusion profile. A further means of manipulation is the application of a weak transverse magnetic field, which strongly increases the spin flow out of the excitation spot. These effects are directly monitored in spin-imaging experiments and spatially resolved Hanle measurements.

Original language	English
Article number	245207
Number of pages	5
Journal	Physical Review. B, Condensed matter and materials physics
Volume	79
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.79.245207
Publication status	Published - Jun 2009

Keywords

gallium arsenide
III-V semiconductors
magneto-optical effects
spin dynamics
spin polarised transport
INJECTION
SEMICONDUCTORS

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10.1103/PhysRevB.79.245207

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title = "Influence of light on spin diffusion in weak magnetic fields",

abstract = "We demonstrate that optical illumination strongly influences spin transport in n-type GaAs. Specifically, increasing the power density of optical spin pumping results in a significant expansion of the spin-diffusion profile. A further means of manipulation is the application of a weak transverse magnetic field, which strongly increases the spin flow out of the excitation spot. These effects are directly monitored in spin-imaging experiments and spatially resolved Hanle measurements.",

keywords = "gallium arsenide, III-V semiconductors, magneto-optical effects, spin dynamics, spin polarised transport, INJECTION, SEMICONDUCTORS",

author = "Quast, {J. -H.} and Astakhov, {G. V.} and W. Ossau and Molenkamp, {L. W.} and J. Heinrich and Sven H{\"o}fling and A. Forchel",

year = "2009",

month = jun,

doi = "10.1103/PhysRevB.79.245207",

language = "English",

volume = "79",

journal = "Physical Review. B, Condensed matter and materials physics",

issn = "1098-0121",

publisher = "American Physical Society",

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T1 - Influence of light on spin diffusion in weak magnetic fields

AU - Quast, J. -H.

AU - Astakhov, G. V.

AU - Ossau, W.

AU - Molenkamp, L. W.

AU - Heinrich, J.

AU - Höfling, Sven

AU - Forchel, A.

PY - 2009/6

Y1 - 2009/6

N2 - We demonstrate that optical illumination strongly influences spin transport in n-type GaAs. Specifically, increasing the power density of optical spin pumping results in a significant expansion of the spin-diffusion profile. A further means of manipulation is the application of a weak transverse magnetic field, which strongly increases the spin flow out of the excitation spot. These effects are directly monitored in spin-imaging experiments and spatially resolved Hanle measurements.

AB - We demonstrate that optical illumination strongly influences spin transport in n-type GaAs. Specifically, increasing the power density of optical spin pumping results in a significant expansion of the spin-diffusion profile. A further means of manipulation is the application of a weak transverse magnetic field, which strongly increases the spin flow out of the excitation spot. These effects are directly monitored in spin-imaging experiments and spatially resolved Hanle measurements.

KW - gallium arsenide

KW - III-V semiconductors

KW - magneto-optical effects

KW - spin dynamics

KW - spin polarised transport

KW - INJECTION

KW - SEMICONDUCTORS

U2 - 10.1103/PhysRevB.79.245207

DO - 10.1103/PhysRevB.79.245207

M3 - Article

SN - 1098-0121

VL - 79

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 24

M1 - 245207

ER -

Influence of light on spin diffusion in weak magnetic fields

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Keywords

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