%0 Journal Article %T Middle-infrared to visible-light ultrafast superconducting single-photon detectors %A Gol'tsman, G. %A Minaeva, O. %A Korneev, A. %A Tarkhov, M. %A Rubtsova, I. %A Divochiy, A. %A Milostnaya, I. %A Chulkova, G. %A Kaurova, N. %A Voronov, B. %A Pan, D. %A Kitaygorsky, J. %A Cross, A. %A Pearlman, A. %A Komissarov, I. %A Slysz, W. %A Wegrzecki, M. %A Grabiec, P. %A Sobolewski, R. %J IEEE Trans. Appl. Supercond. %D 2007 %V 17 %N 2 %@ 1051-8223 %F Goltsman_etal2007 %O exported from refbase (https://db.rplab.ru/refbase/show.php?record=431), last updated on Thu, 06 May 2021 18:13:31 -0500 %X 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. %K SSPD %K SNSPD %R 10.1109/TASC.2007.898252 %U http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4277411 %U https://doi.org/10.1109/TASC.2007.898252 %P 246-251