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New Features of Spatial-Temporal dynamics of Bloch Oscillations

Neue Merkmale der räumlich-zeitlichen Dynamik von Bloch-Oszillationen

Asmontas, S.:
Ultrafast Phenomena in Semiconductors. Proceedings of the 10th International Symposium Semiconductors (10-UFPS)
Uetikon-Zürich: Trans Tech Publications, 1999 (Materials Science Forum 297/298)
ISBN: 0-87849-824-9
International Symposium on Ultrafast Phenomena in Semiconductors (UFPS) <10, 1998, Vilnius>
Conference Paper
Fraunhofer IAF ()
III-V semiconductor; III-V Halbleiter; quantum wells; Quantenfilm; optical measurement; optische Messung

A short laser pulse exciting semiconductor superlattice induces quantum beats between different excitonic states that in turn lead to a formation of a time-varying coherent wave packet. A real spatial oscillations of the excited wave packet identified quantum beats of the Wannier-Stark states as Bloch oscillations. Using a new technique for measurement of the spatial dynamics of Bloch wave packets in semiconductor superlattices we investigate the features of spatial-temporal dynamics on the initial experimental conditions and the composition of the wave packet.