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(a) A polarized laser pulse excitations in the dot, and electrons and holes tunnel out forced by the applied bias voltage. (b) Schematic of a three-terminal spin device, where three normal metal leads are coupled with a QD irradiated by a continuous circularly polarized light.
(a) Total charge current and (b) spin polarization vs the bias voltage for different Coulomb interactions. Other parameters used in the calculation are , , and .
The spin-polarized currents in leads vs (a) the voltage (dashed line) and (b) the Rabi frequency . , , and represent the positions for fully spin-polarized current. and denote the positions for pure spin current. Solid line in Fig. 3(a) represents for . Other parameters used in the calculation are , , , , and .
The spin current with different degrees of polarization vs temperature. Other parameters used in the calculation are , , , , and .
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