Trapping and counting ballistic non-equilibrium electrons

We demonstrate the trapping of electrons propagating ballistically at far-above-equilibrium energies in GaAs/AlGaAs heterostructures in high magnetic field. We find low-loss transport along a gate-modified mesa edge in contrast to an effective decay of excess energy for the loop around a neighboring...

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Bibliographic Details
Published in:arXiv.org 2020-03
Main Authors: Freise, L, Gerster, T, Reifert, D, Weimann, T, Pierz, K, Hohls, F, Ubbelohde, N
Format: Article
Language:English
Subjects:
Circuits
Quantum optics
Single electrons
Trapping
Wave packets
Online Access:Get full text
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Summary:We demonstrate the trapping of electrons propagating ballistically at far-above-equilibrium energies in GaAs/AlGaAs heterostructures in high magnetic field. We find low-loss transport along a gate-modified mesa edge in contrast to an effective decay of excess energy for the loop around a neighboring, mesa-confined node, enabling high-fidelity trapping. Measuring the full counting statistics via single-charge detection yields the trapping (and escape) probabilities of electrons scattered (and excited) within the node. Energetic and arrival-time distributions of captured electron wave packets are characterized by modulating tunnel barrier transmission.
ISSN:2331-8422
DOI:10.48550/arxiv.1902.11253