PT Journal
AU Moshkova, M
   Divochiy, A
   Morozov, P
   Vakhtomin, Y
   Antipov, A
   Zolotov, P
   Seleznev, V
   Ahmetov, M
   Smirnov, K
TI High-performance superconducting photon-number-resolving detectors with 86% system efficiency at telecom range
SO J. Opt. Soc. Am. B
JI J. Opt. Soc. Am. B
PY 2019
BP B20
VL 36
IS 3
DI 10.1364/JOSAB.36.000B20
DE NbN PNR SSPD; SNSPD
AB The use of improved fabrication technology, highly disordered NbN thin films, and intertwined section topology makes it possible to create high-performance photon-number-resolving superconducting single-photon detectors (PNR SSPDs) that are comparable to conventional single-element SSPDs at the telecom range. The developed four-section PNR SSPD has simultaneously an 86±3% system detection efficiency, 35 cps dark count rate, ∼2 ns dead time, and maximum 90 ps jitter. An investigation of the PNR SSPD’s detection efficiency for multiphoton events shows good uniformity across sections. As a result, such a PNR SSPD is a good candidate for retrieving the photon statistics for light sources and quantum key distribution systems.
ER