TY  - JOUR
AU  - Korneeva, Y.
AU  - Sidorova, M.
AU  - Semenov, A.
AU  - Krasnosvobodtsev, S.
AU  - Mitsen, K.
AU  - Korneev, A.
AU  - Chulkova, G.
AU  - Goltsman, G.
PY  - 2016
DA  - 2016//
TI  - Comparison of hot-spot formation in NbC and NbN single-photon detectors
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 1
EP  - 4
VL  - 26
IS  - 3
KW  - NbC
KW  - NbN SSPD
KW  - SNSPD
AB  - 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.
SN  - 1051-8223
UR  - http://ieeexplore.ieee.org/document/7403917/
UR  - https://doi.org/10.1109/TASC.2016.2526009
DO  - 10.1109/TASC.2016.2526009
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1348), last updated on Sun, 30 May 2021 22:34:24 -0500
ID  - Korneeva_etal2016
ER  -