Optical detection of high-field domains in GaAs/AlAs superlattices

1 May 1989

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 54 (18) , 1757-1759
https://doi.org/10.1063/1.101282

Abstract

We investigated the formation of high-field domains in undoped GaAs/AlAs superlattices under strong illumination. The photocurrent-voltage characteristics showed an oscillatory-like behavior which is attributed to the existence of high-field domains. We used photoluminescence (PL) spectroscopy to identify the existing domains as a function of electric field perpendicular to the layers. A total of five PL lines was observed and assigned to different domains through their Stark shift.

Keywords

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