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arXiv · 1012.2016

Mode-filtered electron injection into a waveguide interferometer

Sven S. Buchholz·Ulrich Kunze·Saskia F. Fischer·Dirk Reuter·Andreas D. Wieck
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Abstract

Injection of mode-filtered electrons into a phase-sensitive four-terminal waveguide Aharonov-Bohm (AB) ring is studied. An individually tuneable quantum point contact (QPC) in a waveguide lead of the GaAs/AlGaAs-ring allows to selectively couple to one-dimensional modes in the ring. Thus, we demonstrate single-mode transport in a multi-mode waveguide structure. Coherent mode-filtering by the lowest QPC subband is verified by non-local bend resistance and phase-sensitive AB interference measurements.

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Sven S. Buchholz, Ulrich Kunze, Saskia F. Fischer, Dirk Reuter, Andreas D. Wieck. 2010-12-09. Mode-filtered electron injection into a waveguide interferometer. https://doi.org/10.1063/1.3563714

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