%0 Conference Proceedings
%T Ultrafast and high quantum efficiency large-area superconducting single-photon detectors
%A Korneev, A.
%A Minaeva, O.
%A Divochiy, A.
%A Antipov, A.
%A Kaurova, N.
%A Seleznev, V.
%A Voronov, B.
%A Gol’tsman, G.
%A Pan, D.
%A Kitaygorsky, J.
%A Slysz, W.
%A Sobolewski, R.
%Y Dusek, M.
%Y Hillery, M. S.
%Y Schleich, W. P.
%Y Prochazka, I.
%Y Migdall, A. L.
%Y Pauchard, A.
%S Proc. SPIE
%D 2007
%V 6583
%I Spie
%F Korneev_etal2007
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1249), last updated on Sun, 16 May 2021 15:29:29 -0500
%X We present our latest generation of superconducting single-photon detectors (SSPDs) patterned from 4-nm-thick NbN films, as meander-shaped  0.5-mm-long and  100-nm-wide stripes. The SSPDs exhibit excellent performance parameters in the visible-to-near-infrared radiation wavelengths: quantum efficiency (QE) of our best devices approaches a saturation level of  30% even at 4.2 K (limited by the NbN film optical absorption) and dark counts as low as 2x10[super:-4] Hz. The presented SSPDs were designed to maintain the QE of large-active-area devices, but, unless our earlier SSPDs, hampered by a significant kinetic inductance and a nanosecond response time, they are characterized by a low inductance and GHz counting rates. We have designed, simulated, and tested the structures consisting of several, connected in parallel, meander sections, each having a resistor connected in series. Such new, multi-element geometry led to a significant decrease of the device kinetic inductance without the decrease of its active area and QE. The presented improvement in the SSPD performance makes our detectors most attractive for high-speed quantum communications and quantum cryptography applications.
%K SSPD
%K SNSPD
%K superconducting NbN films
%K infrared single-photon detectors
%R 10.1117/12.723684
%U https://doi.org/10.1117/12.723684
%P 65830I (1 to 9)