TY  - JOUR
AU  - Kitaygorsky, J.
AU  - Komissarov, I.
AU  - Jukna, A.
AU  - Pan, D.
AU  - Minaeva, O.
AU  - Kaurova, N.
AU  - Divochiy, A.
AU  - Korneev, A.
AU  - Tarkhov, M.
AU  - Voronov, B.
AU  - Milostnaya, I.
AU  - Gol'tsman, G.
AU  - Sobolewski, R. R.
PY  - 2007
DA  - 2007//
TI  - Dark counts in nanostructured nbn superconducting single-photon detectors and bridges
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 275
EP  - 278
VL  - 17
IS  - 2
KW  - SSPD
KW  - SNSPD
AB  - We present our studies on dark counts, observed as transient voltage pulses, in current-biased NbN superconducting single-photon detectors (SSPDs), as well as in ultrathin (~4 nm), submicrometer-width (100 to 500 nm) NbN nanobridges. The duration of these spontaneous voltage pulses varied from 250 ps to 5 ns, depending on the device geometry, with the longest pulses observed in the large kinetic-inductance SSPD structures. Dark counts were measured while the devices were completely isolated (shielded by a metallic enclosure) from the outside world, in a temperature range between 1.5 and 6 K. Evidence shows that in our two-dimensional structures the dark counts are due to the depairing of vortex-antivortex pairs caused by the applied bias current. Our results shed some light on the vortex dynamics in 2D superconductors and, from the applied point of view, on intrinsic performance of nanostructured SSPDs.
SN  - 1051-8223
UR  - http://ieeexplore.ieee.org/document/4277521/
UR  - https://doi.org/10.1109/TASC.2007.898109
DO  - 10.1109/TASC.2007.898109
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1248), last updated on Thu, 06 May 2021 16:26:35 -0500
ID  - Kitaygorsky_etal2007
ER  -