Mode-filtered electron injection into a waveguide interferometer

Mode-filtered electron injection into a waveguide interferometer

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 demonst...

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Veröffentlicht in:Applied physics letters 2011-03, Vol.98 (10), p.102111-102111-3
Hauptverfasser: Buchholz, Sven S., Kunze, Ulrich, Reuter, Dirk, Wieck, Andreas D., Fischer, Saskia F.
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container_issue 10
container_start_page 102111
container_title Applied physics letters
container_volume 98
creator Buchholz, Sven S.
Kunze, Ulrich
Reuter, Dirk
Wieck, Andreas D.
Fischer, Saskia F.
description 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 multimode waveguide structure. Coherent mode-filtering by the lowest QPC subband is verified by nonlocal bend resistance and phase-sensitive AB interference measurements.
doi_str_mv 10.1063/1.3563714
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title Mode-filtered electron injection into a waveguide interferometer
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