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Observation of Bloch oscillations in a semiconductor superlattice

Beobachtung von Bloch-Oszillationen in einem Halbleiter-Übergitter

Optical Society of America -OSA-, Washington/D.C.:
OSA Proceedings on Ultrafast Electronics and Optoelectronics. Vol.14
Washington/D.C., 1993 (OSA Proceedings on Ultrafast Electronics and Optoelectronics 14)
pp.142-146 : Abb.,Lit.
Book Article
Fraunhofer IAF ()
heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; superlattice; time resolved photoluminescence; Übergitter; zeitaufgelöste Photolumineszenz

We investigate the polarization decay in biased superlattices with transient degenerate four-wave mixing. The signals have a strong periodic modulation in the field regime where the cw optical spectra show the transitions of a Wannier-Stark ladder. The period of the oscillations is in excellent agreement with Bloch oscillation theory. The oscillation period can be tuned over a large range by varying the electric bias field in the superlattice.