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Optical spin orientation under inter- and intra-subband transitions in QWs

机译:QW中子带内和子带内转换下的光学自旋取向

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摘要

It is shown that absorption of circularly polarized infrared radiation achieved by inter-subband and intra-subband (Drude-Tike) 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 u-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.
机译:结果表明,通过子带间和子带内(Drude-Tike)跃迁实现的圆偏振红外辐射的吸收导致自由载流子的单极自旋取向。通过观察自旋电流和圆形光电流效应,可以证明基于锌共混物的量子阱(QWs)中的单极自旋极化。结果表明,如果考虑价带状态与导带波函数的混合以及价带的自旋轨道分裂,则u型量子阱中的单极自旋取向成为可能。

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