%0 Journal Article
%T Time delay of resistive-state formation in superconducting stripes excited by single optical photons
%A Zhang, J.
%A Słysz, W.
%A Pearlman, A.
%A Verevkin, A.
%A Sobolewski, R.
%A Okunev, O.
%A Chulkova, G.
%A Gol’tsman, G. N.
%J Phys. Rev. B
%D 2003
%V 67
%N 13
%@ 0163-1829
%F Zhang_etal2003
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1519), last updated on Thu, 20 May 2021 19:53:05 -0500
%X We have observed a 65(±5)-ps time delay in the onset of a resistive-state formation in 10-nm-thick, 130-nm-wide NbN superconducting stripes exposed to single photons. The delay in the photoresponse decreased to zero when the stripe was irradiated by multi-photon (classical) optical pulses. Our NbN structures were kept at 4.2 K, well below the material’s critical temperature, and were illuminated by 100-fs-wide optical pulses. The time-delay phenomenon has been explained within the framework of a model based on photon-induced generation of a hotspot in the superconducting stripe and subsequent, supercurrent-assisted, resistive-state formation across the entire stripe cross section. The measured time delays in both the single-photon and two-photon detection regimes agree well with theoretical predictions of the resistive-state dynamics in one-dimensional superconducting stripes.
%K NbN SSPD
%K SNSPD
%R 10.1103/PhysRevB.67.132508
%U https://link.aps.org/doi/10.1103/PhysRevB.67.132508
%U https://doi.org/10.1103/PhysRevB.67.132508
%P 132508 (1 to 4)