Mode-filtered electron injection into a waveguide interferometer

Details Mode-filtered electron injection into a waveguide interferometer Mode-filtered electron injection into a waveguide interferometer

2010-12-09

arxiv.org/abs/1012.2016v1

Appl. Phys. Lett. 98, 102111 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1063/1.3563714

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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