Spin redistribution due to Pauli blocking in quantum dots

21 June 2001

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 64 (4) , 045309
https://doi.org/10.1103/physrevb.64.045309

Abstract

We have studied electron spin dynamics in self-organized InAs/GaAs quantum dots (QD’s) by time-resolved photoluminescence (PL). The electron polarization of the QD discrete energy levels is determined from the circular polarization of the QD emission. When the GaAs barrier is optically pumped, a transient increase of the QD excited-state PL polarization is observed. This effect results from the spin dependence of electron energy relaxation as a consequence of the Pauli exclusion principle. A theoretical model qualitatively describing the experimental results is developed.

Keywords

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