PT Journal
AU Gol'tsman, G
   Minaeva, O
   Korneev, A
   Tarkhov, M
   Rubtsova, I
   Divochiy, A
   Milostnaya, I
   Chulkova, G
   Kaurova, N
   Voronov, B
   Pan, D
   Kitaygorsky, J
   Cross, A
   Pearlman, A
   Komissarov, I
   Slysz, W
   Wegrzecki, M
   Grabiec, P
   Sobolewski, R
TI Middle-infrared to visible-light ultrafast superconducting single-photon detectors
SO IEEE Trans. Appl. Supercond.
JI IEEE Trans. Appl. Supercond.
PY 2007
BP 246
EP 251
VL 17
IS 2
DI 10.1109/TASC.2007.898252
DE SSPD; SNSPD
AB We present an overview of the state-of-the-art of NbN superconducting single-photon detectors (SSPDs). Our devices exhibit quantum efficiency (QE) of up to 30% in near-infrared wavelength and 0.4% at 5 mum, with a dark-count rate that can be as low as 10 -4 s -1 . The SSPD structures integrated with lambda/4 microcavities achieve a QE of 60% at telecommunication, 1550-nm wavelength. We have also developed a new generation of SSPDs that possess the QE of large-active-area devices, but, simultaneously, are characterized by low kinetic inductance that allows achieving short response times and the GHz-counting rate with picosecond timing jitter. The improvements presented in the SSPD development, such as fiber-coupled SSPDs, make our detectors most attractive for high-speed quantum communications and quantum computing.
ER