Optical Spin Orientation under Inter- and Intra-Subband Transitions in QWs

Details Optical Spin Orientation under Inter- and Intra-Subband Transitions in QWs Optical Spin Orientation under Inter- and Intra-Subband Transitions in QWs

2003-01-21

arxiv.org/abs/cond-mat/0301388v1

Physics

Condensed Matter

Scientific paper

It is shown that absorption of circularly polarized infrared radiation achieved by inter-subband and intra-subband (Drude-like) transitions results in a monopolar spin orientation of free carriers. The monopolar spin polarization in zinc-blende-based quantum wells (QWs) is demonstrated by the observation of the spin-galvanic and circular photogalvanic effects. It is shown that monopolar spin orientation in n-type QWs becomes possible if an admixture of valence band states to the conduction band wave function and the spin-orbit splitting of the valence band are taken into account.

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