%0 Journal Article
%T Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors
%A Korneev, A.
%A Kouminov, P.
%A Matvienko, V.
%A Chulkova, G.
%A Smirnov, K.
%A Voronov, B.
%A Gol'tsman, G. N.
%A Currie, M.
%A Lo, W.
%A Wilsher, K.
%A Zhang, J.
%A Słysz, W.
%A Pearlman, A.
%A Verevkin, A.
%A Sobolewski, Roman
%J Appl. Phys. Lett.
%D 2004
%V 84
%N 26
%@ 0003-6951
%F Korneev_etal2004
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=532), last updated on Tue, 18 May 2021 11:39:54 -0500
%X We have measured the quantum efficiencysQEd, GHz counting rate, jitter, and noise-equivalentpowersNEPdof nanostructured NbN superconducting single-photon detectorssSSPDsdin thevisible to infrared radiation range. Our 3.5-nm-thick and 100- to 200-nm-wide meander-typedevices(total area 10310mm2), operating at 4.2 K, exhibit an experimental QE of up to 20% inthe visible range and,10% at 1.3 to 1.55mm wavelength and are potentially sensitive up tomidinfrareds,10mmdradiation. The SSPD counting rate was measured to be above 2 GHz withjitter,18 ps, independent of the wavelength. The devices’ NEP varies from,10−17W/Hz1/2for1.55mm photons to,10−20W/Hz1/2for visible radiation. Lowering the SSPD operatingtemperature to 2.3 K significantly enhanced its performance, by increasing the QE to,20% andlowering the NEP level to,3310−22W/Hz1/2, both measured at 1.26mm wavelength.
%K SSPD
%K NEP
%K QE
%R 10.1063/1.1764600
%U http://link.aip.org/link/APPLAB/v84/i26/p5338/s1&Agg=doi
%U https://doi.org/10.1063/1.1764600
%P 5338-5340