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Opt Express. 2013 Apr 22;21(8):10208-14. doi: 10.1364/OE.21.010208.

High performance fiber-coupled NbTiN superconducting nanowire single photon detectors with Gifford-McMahon cryocooler.

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1
Advanced ICT Research Institute, National Institute of Information and Communications Technology, 588-2, Iwaoka, Kobe, Hyogo 651-2492, Japan. s-miki@nict.go.jp

Abstract

We present high performance fiber-coupled niobium titanium nitride superconducting nanowire single photon detectors fabricated on thermally oxidized silicon substrates. The best device showed a system detection efficiency (DE) of 74%, dark count rate of 100 c/s, and full width at half maximum timing jitter of 68 ps under a bias current of 18.0 μA with a practical Gifford-McMahon cryocooler system. We also introduced six detectors into the cryocooler and confirmed that the system DE of all detectors was higher than 67% at the dark count rate of 100 c/s.

PMID:
23609728
[Indexed for MEDLINE]
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