Optically induced spin polarization of an electric current through a quantum dot

Details Optically induced spin polarization of an electric current through a quantum dot Optically induced spin polarization of an electric current through a quantum dot

2004-07-15

arxiv.org/abs/cond-mat/0407376v2

Physics

Condensed Matter

Other Condensed Matter

Several misprints are corrected

Scientific paper

10.1103/PhysRevB.71.161305

We examine electron transport through semiconductor quantum dot subject to a continuous circularly polarized optical irradiation resonant to the electron - heavy hole transition. Electrons having certain spin polarization experience Rabi oscillation and their energy levels are shifted by the Rabi frequency. Correspondingly, the equilibrium chemical potential of the leads and the lead-to-lead bias voltage can be adjusted so only electrons with spin-up polarization or only electrons with spin-down polarization contribute to the current. The temperature dependence of the spin polarization of the current is also discussed.

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