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Observation of Bloch oscillations in a semiconductor superlattice



Solid State Communications 84 (1992), Nr.10, S.943-946 : Abb.,Lit.
ISSN: 0038-1098
Fraunhofer IAF ()
heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; time resolved photoluminescence; zeitaufgelöste Photolumineszenz

We report unambiguous experimental evidence for electron Bloch oscillations: The transient four-wave mixing signal of a biased semiconductor superlattice shows a periodic modulation with a time constant expected from Bloch oscillation theory. The oscillation frequency can be tuned over 400% with the applied electric field. The electron performs up to four oscillation cycles before the coherence is lost.