@Article{Korneev_etal2004, author="Korneev, A. and Kouminov, P. and Matvienko, V. and Chulkova, G. and Smirnov, K. and Voronov, B. and Gol{\textquoteright}tsman, G. N. and Currie, M. and Lo, W. and Wilsher, K. and Zhang, J. and S{\l}ysz, W. and Pearlman, A. and Verevkin, A. and Sobolewski, Roman", title="Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors", journal="Appl. Phys. Lett.", year="2004", volume="84", number="26", pages="5338--5340", optkeywords="SSPD; NEP; QE", abstract="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{\textquoteright} 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.", optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=532), last updated on Tue, 18 May 2021 11:39:54 -0500", issn="0003-6951", doi="10.1063/1.1764600", opturl="http://link.aip.org/link/APPLAB/v84/i26/p5338/s1&Agg=doi", opturl="https://doi.org/10.1063/1.1764600" }