Spin-sensitive Bleaching and Spin-Relaxation in QW's

Details Spin-sensitive Bleaching and Spin-Relaxation in QW's Spin-sensitive Bleaching and Spin-Relaxation in QW's

2003-03-04

arxiv.org/abs/cond-mat/0303056v1

Physics

Condensed Matter

Scientific paper

Spin-sensitive saturation of absorption of infrared radiation has been investigated in p-type GaAs QWs. It is shown that the absorption saturation of circularly polarized radiation is mostly controlled by the spin relaxation time of the holes. The saturation behavior has been investigated for different QW widths and in dependence on the temperature with the result that the saturation intensity substantially decreases with narrowing of QWs. Spin relaxation times were experimentally obtained by making use of calculated (linear) absorption coefficients for inter-subband transitions.

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