@Article{Ferrari_etal2017,
author="Ferrari, S.
and Kovalyuk, V.
and Hartmann, W.
and Vetter, A.
and Kahl, O.
and Lee, C.
and Korneev, A.
and Rockstuhl, C.
and Gol{\textquoteright}tsman, G.
and Pernice, W.",
title="Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors",
journal="Opt. Express",
year="2017",
volume="25",
number="8",
pages="8739--8750",
optkeywords="SSPD; SNSPD; photon counting; Infrared; Quantum detectors; Integrated optics; Multiphoton processes; Photon statistics",
abstract="We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 +/- 1)ps is obtained when applying a bias current of 50{\%} of the switching current at 1.7 K bath temperature. We also propose a practical approach to accurately estimate the photon detection regimes based on the reconstruction of the measured detector tomography at different bias currents and for different illumination conditions.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1118), last updated on Sat, 01 May 2021 23:21:39 -0500"
}