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Polarization revival of a Bloch-oscillating wave packet in conjunction with resonant Zener tunneling

Polarisationserneuerung einer Bloch-oszillierenden Wellenpackets in Verbindung mit resonanten Zenertunneln
 
: Meinhold, D.; Rosam, B.; Löser, F.; Lyssenko, V.G.; Rossi, F.; Zhang, J.-Z.; Köhler, K.; Leo, K.

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Physical Review. B 65 (2002), Nr.11, Art. 113302, 3 S.
ISSN: 0163-1829
ISSN: 1098-0121
ISSN: 0556-2805
Englisch
Zeitschriftenaufsatz
Fraunhofer IAF ()
III-V Halbleiter; III-V semiconductor; superlattice; Übergitter; time-resolved photocurrent; zeitaufgelöste Photolumineszenz

Abstract
We investigate the dynamics of a Bloch-oscillating wave packet in the presence of strong coupling to delocalized above barrier states (Zener tunneling), using time-resolved intraband polarization-sensitive measurements. At a threshold electric field, the resonance of localized and delocalized states causes a quantum beating which is observed as a revival in the intraband polarization. Our numerical simulation visualizes the spatial wave packet decomposition and reformation. The wave packet moves on a ps time scale over a distance of more than 100 nm and sequentially undergoes Bloch oscillations in the below- and above-barrier bands.

: http://publica.fraunhofer.de/dokumente/N-9440.html