Mode-filtered electron injection into a waveguide interferometer

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.

3 pages, 3 figures

References in corpus (6)

• Probing the microscopic structure of bound states in quantum point contacts
• Energy-level pinning and the 0.7 spin state in one dimension: GaAs quantum wires studied using finite-bias spectroscopy
• Universality of Bias- and Temperature-induced Dephasing in Ballistic Electronic Interferometers
• Control of the transmission phase in an asymmetric four-terminal Aharonov-Bohm interferometer
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Cited by in corpus (1)

• Time-dependent wave packet simulations of transport through Aharanov-Bohm rings with an embedded quantum dot