TY  - JOUR
AU  - Zolotov, P. I.
AU  - Semenov, A. V.
AU  - Divochiy, A. V.
AU  - Goltsman, G. N.
AU  - Romanov, N. R.
AU  - Klapwijk, T. M.
PY  - 2021
DA  - 2021//
TI  - Dependence of photon detection efficiency on normal-state sheet resistance in marginally superconducting films of NbN
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 1
EP  - 5
VL  - 31
IS  - 5
KW  - NbN SSPD
KW  - SNSPD
AB  - We present an extensive set of data on nanowire-type superconducting single-photon detectors based on niobium-nitride (NbN) to establish the empirical correlation between performance and the normal-state resistance per square. We focus, in particular, on the bias current, compared to the expected depairing current, needed to achieve a near-unity detection efficiency for photon detection. The data are discussed within the context of a model in which the photon energy triggers the movement of vortices i.e. superconducting dissipation, followed by thermal runaway. Since the model is based on the non-equilibrium theory for conventional superconductors deviations may occur, because the efficient regime is found when NbN acts as a marginal superconductor in which long-range phase coherence is frustrated.
SN  - 1051-8223
UR  - https://ieeexplore.ieee.org/document/9362289/
UR  - https://doi.org/10.1109/TASC.2021.3061923
DO  - 10.1109/TASC.2021.3061923
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1222), last updated on Mon, 03 May 2021 22:14:28 -0500
ID  - Zolotov_etal2021
ER  -