Abstract

It is shown that spin orientation of free carriers in low-dimensional semiconductor structures can be achieved by optical excitation with linearly polarized light. This effect is related to reduced symmetry of lowdimensional structures as compared to bulk crystals and is forbidden in bulk cubic semiconductors. Theory of the optical orientation of electron spins by linearly polarized light is presented here for direct interband optical transitions in undoped quantum wells and indirect intrasubband (Drude-like) transitions in n -type quantum well structures. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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