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Spin-Sensitive Bleaching and Monopolar Spin Orientation in Quantum Wells

DOI to cite this document:
10.5283/epub.11192
Ganichev, Sergey ; Danilov, Sergey ; Belkov, Vassilij ; Ivchenko, Eougenious ; Wegscheider, Werner ; Weiss, Dieter ; Bichler, Max
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Date of publication of this fulltext: 30 Nov 2009 14:12


Abstract

Spin-sensitive bleaching of the absorption of far-infrared radiation has been observed in p-type GaAs/AlGaAs quantum well structures. The absorption of circularly polarized radiation saturates at lower intensities than that of linearly polarized light due to monopolar spin orientation in the first heavy-hole subband. Spin relaxation times of holes in p-type material in the range of tens of ps were derived from the intensity dependence of the absorption.


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