Physics – Condensed Matter – Materials Science
Scientific paper
2008-10-24
Physics
Condensed Matter
Materials Science
Scientific paper
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 spin flow out of the excitation spot. These effects are directly monitored in spin imaging experiments and spatially resolved Hanle measurements.
Astakhov Georgy V.
Forchel Alfred
Heinrich Joel
Höfling Sven
Molenkamp Laurens W.
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