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Carrier-spin dynamics in GaAs quantum disks (QD) fabricated by top-down lithography using bio-templates were investigated by means of reflection-type spin-resolved pump-probe spectroscopy. The temperature dependence of electron-spin relaxation time (τs) is found to obey τs ∝ T−3 above 100 K, indicating spin-loss in the barrier due to thermal redistribution of the electron between the QDs and barrier.
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