TY - JOUR AU - Kitaygorsky, J. AU - Zhang, J. AU - Verevkin, A. AU - Sergeev, A. AU - Korneev, A. AU - Matvienko, V. AU - Kouminov, P. AU - Smirnov, K. AU - Voronov, B. AU - Gol'tsman, G. AU - Sobolewski, R. PY - 2005 DA - 2005// TI - Origin of dark counts in nanostructured NbN single-photon detectors T2 - IEEE Trans. Appl. Supercond. JO - IEEE Trans. Appl. Supercond. SP - 545 EP - 548 VL - 15 IS - 2 KW - SSPD dark counts KW - SNSPD KW - dark counts rate AB - We present our study of dark counts in ultrathin (3.5 to 10 nm thick), narrow (120 to 170 nm wide) NbN superconducting stripes of different lengths. In experiments, where the stripe was completely isolated from the outside world and kept at temperature below the critical temperature Tc, we detected subnanosecond electrical pulses associated with the spontaneous appearance of the temporal resistive state. The resistive state manifested itself as generation of phase-slip centers (PSCs) in our two-dimensional superconducting stripes. Our analysis shows that not far from Tc, PSCs have a thermally activated nature. At lowest temperatures, far below Tc, they are created by quantum fluctuations. UR - https://doi.org/10.1109/TASC.2005.849914 DO - 10.1109/TASC.2005.849914 N1 - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1057), last updated on Mon, 17 May 2021 16:47:36 -0500 ID - Kitaygorsky_etal2005 ER -