High spin polarization of optically-oriented trions in p-doped GaAs-AlGaAs quantum wells

Wagenhuber, Klaus and Shalygin, Vadim and Niedermeier, Ulrich and Gerl, Christian and Wegscheider, Werner and Korn, Tobias and Schulz, Robert and Schüller, Christian and Ivchenko, Eougenious and Ganichev, Sergey (2007) High spin polarization of optically-oriented trions in p-doped GaAs-AlGaAs quantum wells. AIP Conference Proceedings 893, pp. 439-440.

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Abstract

We performed cw-photoluminescence (PL) measurements on a 15 nm wide p-doped Al0.3Ga0.7As-GaAs-Al0.3Ga0.7As quantum well structure at low temperatures. By irradiating the sample with circularly polarized light and analyzing the degree of circular polarization of the PL signal, we found a significantly higher degree of spin polarization for charged excitons (trions) than for neutral excitons. Time-resolved pump-probe and Faraday-rotation experiments give an additional information concerning the exciton and trion resonant photoexcitation.

Item Type:Article
Institutions: Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev
Identification Number:
ValueType
10.1063/1.2729954DOI
Subjects:500 Science > 530 Physics
Status:Published
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Owner:Christoph Drexler
Deposited On:05 Oct 2007
Last Modified:17 Nov 2009 05:03
Item ID:2133
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