Subpicosecond real-space charge transfer in type-II GaAs/AlAs superlattices

17 April 1989

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

Vol. 62 (16) , 1892-1895
https://doi.org/10.1103/physrevlett.62.1892

Abstract

We have directly measured the real-space transfer times associated with Γ→X intervalley scattering in type-II GaAs/AlAs superlattices by femtosecond optical pump and probe spectroscopy. We domonstrate that the scattering rate for this unique process connecting electron states in different slabs of the superlattice is related to the spatial overlap of the electronic envelope wave functions in different satellite minima.

Keywords

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