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

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.
Authors:
; ; ;  [1] ;  [2] ; ; ;  [3] ;  [4]
  1. School of Engineering, University of Glasgow, Glasgow G12 8LT, Scotland (United Kingdom)
  2. Department of Statistics, University of Leeds, Leeds LS2 9JT (United Kingdom)
  3. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS (United Kingdom)
  4. Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)
Publication Date:
OSTI Identifier:
22283197
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; EFFICIENCY; MULTI-PHOTON PROCESSES; PHOTONS; QUANTUM WIRES; SUPERCONDUCTING DEVICES; SUPERCONDUCTORS