Journal of Low Temperature Physics

, Volume 167, Issue 5–6, pp 822–826 | Cite as

Dark Count Suppression in Superconducting Nanowire Single Photon Detectors

  • M. Hofherr
  • D. Rall
  • K. Il‘in
  • A. Semenov
  • H.-W. Hübers
  • M. Siegel
Article

Abstract

One of the important performance parameters of superconducting nanowire single photon detectors (SNSPD) is the dark count rate. Dark counts are related to thermally-activated hopping of magnetic vortices across the nanowire. We present an experimental analysis of how the thermal coupling of the NbN SNSPD to the heat sink affects the dark count rate. It was found that the rate decreases with the increase in coupling strength while the detection efficiency remains almost constant.

Keywords

NbN Superconductivity of thin films Fluctuations Vortex Dark counts Superconducting detectors 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • M. Hofherr
    • 1
  • D. Rall
    • 1
  • K. Il‘in
    • 1
  • A. Semenov
    • 2
  • H.-W. Hübers
    • 2
    • 3
  • M. Siegel
    • 1
  1. 1.Institut für Mikro- und Nanoelektronische SystemeKITKarlsruheGermany
  2. 2.Institut für PlanetenforschungDLRBerlinGermany
  3. 3.Institut für Optik und Atomare PhysikTechnische Universität BerlinBerlinGermany

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