Integrated Joule switches for the control of current dynamics in parallel superconducting strips

Casaburi, A. , Heath, R.M. , Cristiano, R., Ejrnaes, M., Zen, N., Ohkubo, M. and Hadfield, R.H. (2018) Integrated Joule switches for the control of current dynamics in parallel superconducting strips. Superconductor Science and Technology, 31(6), 06LT01. (doi:10.1088/1361-6668/aabcfd)

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Abstract

Understanding and harnessing the physics of the dynamic current distribution in parallel superconducting strips holds the key to creating next generation sensors for single molecule and single photon detection. Non-uniformity in the current distribution in parallel superconducting strips leads to low detection efficiency and unstable operation, preventing the scale up to large area sensors. Recent studies indicate that non-uniform current distributions occurring in parallel strips can be understood and modeled in the framework of the generalized London model. Here we build on this important physical insight, investigating an innovative design with integrated superconducting-to-resistive Joule switches to break the superconducting loops between the strips and thus control the current dynamics. Employing precision low temperature nano-optical techniques, we map the uniformity of the current distribution before- and after the resistive strip switching event, confirming the effectiveness of our design. These results provide important insights for the development of next generation large area superconducting strip-based sensors.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert and Heath, Mr Robert and Casaburi, Dr Alessandro
Authors: Casaburi, A., Heath, R.M., Cristiano, R., Ejrnaes, M., Zen, N., Ohkubo, M., and Hadfield, R.H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Superconductor Science and Technology
Publisher:IOP Publishing
ISSN:0953-2048
ISSN (Online):1361-6668
Published Online:26 April 2018
Copyright Holders:Copyright © 2018 IOP Publishing Ltd
First Published:First published in Superconductor Science and Technology 31(6):06LT01
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
6672319UK Quantum Technology Hub in Enhanced Quantum ImagingMiles PadgettEngineering and Physical Sciences Research Council (EPSRC)EP/M01326X/1S&E P&A - PHYSICS & ASTRONOMY