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Subpicosecond transient four-wave-mixing experiments. A novel method to study resonant tunneling.

Subpikosekunden Transienten Vier-Wellen-Misch Experimente. Eine neue Methode zur Untersuchung von resonanten Tunneln

Superlattices and Microstructures 7 (1990), No.4, pp.427-432 : Abb.,Lit.
ISSN: 0749-6036
Journal Article
Fraunhofer IAF ()
heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; photoluminescence; Photolumineszenz; PL; time-resolved PL; zeitaufgelöste PL

We introduce sub-picosecond transient four-wave-mixing techniques as a novel tool to optically study resonant tunneling in semiconductor heterostructures. The resonant carrier transfer in an asymmetric double quantum well structure is traced by monitoring the decay of the diffracted signal as a function of the applied electric field. The decay of the diffracted signal is much faster when the alignment of the electronic levels leads to resonant tunneling and scattering.