Nano-optical observation of cascade switching in a parallel superconducting nanowire single photon detector

Heath, R. M. , Tanner, M. G., Casaburi, A. , Webster, M. G., San Emeterio Alvarez, L., Jiang, W., Barber, Z. H., Warburton, R. J. and Hadfield, R. H. (2014) Nano-optical observation of cascade switching in a parallel superconducting nanowire single photon detector. Applied Physics Letters, 104(6), 063503. (doi:10.1063/1.4865199)

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Abstract

The device physics of parallel-wire superconducting nanowire single photon detectors is based on a cascade process. Using nano-optical techniques and a parallel wire device with spatially separate pixels, we explicitly demonstrate the single- and multi-photon triggering regimes. We develop a model for describing efficiency of a detector operating in the arm-trigger regime. We investigate the timing response of the detector when illuminating a single pixel and two pixels. We see a change in the active area of the detector between the two regimes and find the two-pixel trigger regime to have a faster timing response than the one-pixel regime.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert and Tanner, Dr Michael and Heath, Mr Robert and Casaburi, Dr Alessandro
Authors: Heath, R. M., Tanner, M. G., Casaburi, A., Webster, M. G., San Emeterio Alvarez, L., Jiang, W., Barber, Z. H., Warburton, R. J., and Hadfield, R. H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Applied Physics Letters
ISSN:0003-6951
ISSN (Online):1077-3118
Copyright Holders:Copyright © 2014 American Institute of Physics
First Published:First published in Applied Physics Letters 104(6):063503
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
622331Lithium niobate integrated quantum photonicsRobert HadfieldEngineering & Physical Sciences Research Council (EPSRC)EP/I036273/1ENG - ENGINEERING ELECTRONICS & NANO ENG