Lateral Spin Diffusion Probed by Two-Color Hanle-MOKE Technique |
| J.-H. Quast, G.V. Astakhov, W. Ossau, L.W. Molenkamp
Physikalisches Institut (EP3), Universität Würzburg, 97074 Würzburg, Germany J. Heinrich, S. Höfling and A. Forchel Physikalisches Institut (TP), Universität Würzburg, 97074 Würzburg, Germany |
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| Received: 7 06 2008; |
| We report on all optical spatially resolved spin diffusion experiments in an unstrained, unbiased n-GaAs layer. Optical pump and probe intensities are varied over a wide range to study the impact of optical disturbance on spin transport. Both quantities have a considerable influence on the measured spin diffusion length and spin lifetime. Furthermore, an effective spin diffusion coefficient was obtained as a function of temperature. |
| DOI: 10.12693/APhysPolA.114.1311 PACS numbers: 72.25.Dc, 72.25.Fe, 85.75.-d, 72.25.Rb |