Makhonin, M. N. and Tartakovskii, A. I. and Van'kov, A. B. and Drouzas, I. and Wright, T. and Skiba-Szymanska, J. and Russell, A. and Falko, Vladimir and Skolnick, M. S. and Liu, H. -Y. and Hopkinson, M. (2008) Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots. Physical review b, 77 (12). -. ISSN 1098-0121
Full text not available from this repository.Abstract
Nuclear polarization dynamics are measured in the nuclear spin bistability regime in a single optically pumped InGaAs/GaAs quantum dot. The controlling role of nuclear spin diffusion from the dot into the surrounding material is revealed in pump-probe measurements of the nonlinear nuclear spin dynamics. We measure nuclear spin polarization decay times in the range of 0.2-5 s, strongly dependent on the optical pumping time. The long nuclear spin decay arises from polarization of the material surrounding the dot by spin diffusion for long (>5s) pumping times. The time-resolved methods allow the detection of the unstable nuclear polarization state in the bistability regime otherwise undetectable in cw experiments.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Physical review b |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics Faculty of Science and Technology > Engineering |
| ID Code: | 57006 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 16 Aug 2012 16:52 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 16 Aug 2012 16:52 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/57006 |
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