%0 Journal Article
%T Comparison of hot-spot formation in NbC and NbN single-photon detectors
%A Korneeva, Y.
%A Sidorova, M.
%A Semenov, A.
%A Krasnosvobodtsev, S.
%A Mitsen, K.
%A Korneev, A.
%A Chulkova, G.
%A Goltsman, G.
%J IEEE Trans. Appl. Supercond.
%D 2016
%V 26
%N 3
%@ 1051-8223
%F Korneeva_etal2016
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1348), last updated on Sun, 30 May 2021 22:34:24 -0500
%X We report an experimental investigation of the hot-spot evolution in superconducting single-photon detectors made of disordered superconducting materials with different diffusivity and energy downconversion time values, i.e., 33-nm-thick NbN and 23-nm-thick NbC films. We have demonstrated that, in NbC film, only 405-nm photons produce sufficiently large hot spot to trigger a single-photon response. The dependence of detection efficiency on bias current for 405-nm photons in NbC is similar to that for 3400-nm photons in NbN. In NbC, large diffusivity and downconversion time result in 1-D critical current suppression profile compared with the usual 2-D profile in NbN.
%K NbC
%K NbN SSPD
%K SNSPD
%R 10.1109/TASC.2016.2526009
%U http://ieeexplore.ieee.org/document/7403917/
%U https://doi.org/10.1109/TASC.2016.2526009
%P 1-4