Coulomb blockade directional coupler

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 31 Jan 2005Embargo end date: 01 Jan 2004 Italy, United Kingdom English Publisher:AIP PublishingJournal:Applied Physics Letters, volume 86, page 52,102 (issn: 0003-6951, eissn: 1077-3118,

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Authors: PINGUE, Pasqualantonio; V. PIAZZA; BELTRAM, Fabio; I. FARRER; D. A. RITCHIE; M. PEPPER;

doi: 10.1063/1.1857078 , 10.48550/arxiv.cond-mat/0412507

arXiv: cond-mat/0412507

handle: 11384/13193

Coulomb blockade directional coupler

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Abstract

A tunable directional coupler based on Coulomb Blockade effect is presented. Two electron waveguides are coupled by a quantum dot to an injector waveguide. Electron confinement is obtained by surface Schottky gates on single GaAs/AlGaAs heterojunction. Magneto-electrical measurements down to 350 mK are presented and large transconductance oscillations are reported on both outputs up to 4.2 K. Experimental results are interpreted in terms of Coulomb Blockade effect and the relevance of the present design strategy for the implementation of an electronic multiplexer is underlined.

4 pages, 4 figures, to be published in Applied Physics Letters

Countries

Italy, United Kingdom

Related Organizations

Cavendish Laboratory
United Kingdom
University of Cambridge
United Kingdom
Nest Labs
United States
Scuola Normale Superiore
Italy
White Rose Consortium: University of Leeds; University of Sheffield; University of York
United Kingdom

Keywords

heterojunctions, multiplexing, Condensed Matter - Mesoscale and Nanoscale Physics, Physics, semiconducting gallium arsenide, Quantum Dots; Magnetic fields; Electron gas; Culomb blockade, FOS: Physical sciences, waveguides, electric connectors, transconductance, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), MESFET devices

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