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Electro-optical multistability in GaAs/AlAs superlattices at room temperature.

Elektro-optische Multistabilität in GaAs/AlAs Übergittern bei Raumtemperatur
 

Applied Physics Letters 56 (1990), No.7, pp.605-607 : Abb.,Lit.
ISSN: 0003-6951
ISSN: 1077-3118
English
Journal Article
Fraunhofer IAF ()
Bistabilität; bistability; Multistabilität; multistability; Stark localization; Stark-Lokalisierung; superlattice; Übergitter

Abstract
We have studied the optical absorption properties of a GaAs/AlAs short-period superlattice at room temperature in an electric field perpendicular to the layers. Several pronounced optical transitions related to Wannier-Stark localization are observed indicating a choherence length of at least five superlattice periods. These transitions produce multiple regions of negative differential photoconductivity which are used to realize a multistable self-electro-optic effect device.

: http://publica.fraunhofer.de/documents/PX-11622.html