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Spectroscopy of Quantum Dot Orbitals with In-Plane Magnetic Fields

Camenzind, Leon C. and Yu, Liuqi and Stano, Peter and Zimmerman, Jeramy D. and Gossard, Arthur C. and Loss, Daniel and Zumbühl, Dominik M.. (2019) Spectroscopy of Quantum Dot Orbitals with In-Plane Magnetic Fields. Physical Review Letters, 122 (20). p. 207701.

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Official URL: https://edoc.unibas.ch/75403/

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Abstract

We show that in-plane magnetic-field-assisted spectroscopy allows extraction of the in-plane orientation and full 3D size parameters of the quantum mechanical orbitals of a single electron GaAs lateral quantum dot with subnanometer precision. The method is based on measuring the orbital energies in a magnetic field with various strengths and orientations in the plane of the 2D electron gas. From such data, we deduce the microscopic confinement potential landscape and quantify the degree by which it differs from a harmonic oscillator potential. The spectroscopy is used to validate shape manipulation with gate voltages, agreeing with expectations from the gate layout. Our measurements demonstrate a versatile tool for quantum dots with one dominant axis of strong confinement.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel and Zumbühl, Dominik M
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:0031-9007
e-ISSN:1079-7114
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:21 Apr 2020 10:03
Deposited On:05 Apr 2020 13:04

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