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Spin current injection by intersubband transitions in quantum wells
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View: Figures


Image of FIG. 1.
FIG. 1.

The ratio as a function of the electron concentration . Dashed curve: , solid curve , the QW width . The parameters are: , , , , where is a free electron mass.

Image of FIG. 2.
FIG. 2.

(a) The intersubband transitions leading to the injection of pure spin current. Thick arrow line corresponds to . Thin arrow lines correspond to transitions at . (b) Resonance curves . Solid (dash) lines describe the spin-conserving (spin–flip) transitions. In each case the outer curve is for and the inner curve for . The circle marked as is the Fermi line at . The parameters are: , , , , and .

Image of FIG. 3.
FIG. 3.

(a) The speed for different constants (values in units are presented near the curves). Other parameters are the same as in Fig. 2, , and . (b) Components of the induced spin current for .

Image of FIG. 4.
FIG. 4.

-dependence of for different parameters . The units of incident light power density are . We take an incidence angle , , and . The rigid QW walls model is used for the calculation.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spin current injection by intersubband transitions in quantum wells