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Proceedings Paper

Optical detection of resonant tunneling in GaAs/AlAs superlattices
Author(s): Harald Schneider; Holger T. Grahn; K. V. Klitzing; Klaus H. Ploog
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Paper Abstract

Recent experimental results on the physics of coherent and incoherent resonant tunneling in superlattices with an electric field perpendicular to the layers are discussed. For the case of weak coupling between the wells, we observe a decrease of the time constant for electron transport if different subbands of adjacent wells are at resonance. In this case) transport is incoherent and sequential. This leads to an efficient population of higher conduction subbands by non-thermal carriers which can be probed by photoluminescence experiments. For the case of strong inter-well coupling, on the other hand, coherence gives rise to resonance-induced delocalization phenomena which have been studied by photocurrent spectroscopy.

Paper Details

Date Published: 1 October 1990
PDF: 13 pages
Proc. SPIE 1283, Quantum Well and Superlattice Physics III, (1 October 1990); doi: 10.1117/12.20723
Show Author Affiliations
Harald Schneider, Fraunhofer-IAF and Max-Planck-Institut fuer Festkoerperforschung (Germany)
Holger T. Grahn, Max-Planck-Institut fuer Festkoerperforschung (Germany)
K. V. Klitzing, Max-Planck-Institut fuer Festkoerperforschung (Germany)
Klaus H. Ploog, Max-Planck-Institut fuer Festkoerperforschung (Germany)

Published in SPIE Proceedings Vol. 1283:
Quantum Well and Superlattice Physics III
Gottfried H. Doehler; Emil S. Koteles; Joel N. Schulman, Editor(s)

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