Direct mapping of photoexcited local spins in a modulation-doped GaAs/AlGaAs wires

We directly measured the spatiotemporal evolution of photoexcited local spins in wires made from a modulation-doped GaAs/AlGaAs quantum well by using a time- and spatially resolved Kerr microscopy. We observed the spatial pattern of spin-up and -down near the case of persistent spin helix (PSH) in w...

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Published inJapanese Journal of Applied Physics Vol. 53; no. 4S; pp. 4 - 1-04EM04-3
Main Authors Ishihara, Jun, Ohno, Yuzo, Ohno, Hideo
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.04.2014
Subjects
Aluminum gallium arsenides
Evolution
Gallium arsenide
Gallium arsenides
Mapping
Microscopy
Quantum wells
Spin-orbit interactions
Wire
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Summary:We directly measured the spatiotemporal evolution of photoexcited local spins in wires made from a modulation-doped GaAs/AlGaAs quantum well by using a time- and spatially resolved Kerr microscopy. We observed the spatial pattern of spin-up and -down near the case of persistent spin helix (PSH) in wires and the retention of the initial spin state in [110] wires which were designed such that the Dresselhaus and Rashba spin-orbit interaction are nearly equal to each other in magnitude.
Bibliography:ObjectType-Article-1
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ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.53.04EM04