Optical detection of resonant tunneling in GaAs/AlAs superlattices

Harald Schneider; Holger T. Grahn; K. V. Klitzing; Klaus H. Ploog

doi:10.1117/12.20723

1 October 1990 Optical detection of resonant tunneling in GaAs/AlAs superlattices

Harald Schneider, Holger T. Grahn, K. V. Klitzing, Klaus H. Ploog

Proceedings Volume 1283, Quantum Well and Superlattice Physics III; (1990) https://doi.org/10.1117/12.20723
Event: Advances in Semiconductors and Superconductors: Physics Toward Devices Applications, 1990, San Diego, CA, United States

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.

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Harald Schneider, Holger T. Grahn, K. V. Klitzing, and Klaus H. Ploog "Optical detection of resonant tunneling in GaAs/AlAs superlattices", Proc. SPIE 1283, Quantum Well and Superlattice Physics III, (1 October 1990); https://doi.org/10.1117/12.20723

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