@Article{Polyakova_etal2019,
author="Polyakova, M.
and Semenov, A. V.
and Kovalyuk, V.
and Ferrari, S.
and Pernice, W. H. P.
and Gol{\textquoteright}tsman, G. N.",
title="Protocol of measuring hot-spot correlation length for SNSPDs with near-unity detection efficiency",
journal="IEEE Trans. Appl. Supercond.",
year="2019",
volume="29",
number="5",
pages="1--5",
optkeywords="SSPD; waveguide-integrated SNSPD; hot-spot interaction length",
abstract="We present a simple quantum detector tomography protocol, which allows, without ambiguities, to measure the two-spot detection efficiency and extract the hot-spot interaction length of superconducting nanowire single photon detectors (SNSPDs) with unity intrinsic detection efficiency. We identify a significant parasitic contribution to the measured two-spot efficiency, related to an effect of the bias circuit, and find a way to rule out this contribution during data post-processing and directly in the experiment. From the data analysis for waveguide-integrated SNSPD, we find signatures of the saturation of the two-spot efficiency and hot-spot interaction length of order of 100 nm.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1187), last updated on Sat, 01 May 2021 15:26:47 -0500",
issn="1051-8223",
doi="10.1109/TASC.2019.2906267",
opturl="https://ieeexplore.ieee.org/document/8675504/",
opturl="https://doi.org/10.1109/TASC.2019.2906267"
}