title: Spin-sensitive bleaching and monopolar spin orientation in quantum wells.
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.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany.
authors.forename: S D
authors.initials: SD
authors.lastname: Ganichev
authors.forename: S N
authors.initials: SN
authors.lastname: Danilov
authors.forename: V V
authors.initials: VV
authors.lastname: Bel'kov
authors.forename: E L
authors.initials: EL
authors.lastname: Ivchenko
authors.forename: M
authors.initials: M
authors.lastname: Bichler
authors.forename: W
authors.initials: W
authors.lastname: Wegscheider
authors.forename: D
authors.initials: D
authors.lastname: Weiss
authors.forename: W
authors.initials: W
authors.lastname: Prettl