%0 Journal Article
%T Timing jitter in NbN superconducting microstrip single-photon detector
%A Vodolazov, D. Y.
%A Manova, N. N.
%A Korneeva, Y. P.
%A Korneev, A. A.
%J Phys. Rev. Applied
%D 2020
%V 14
%N 4
%@ 2331-7019
%F Vodolazov_etal2020
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1788), last updated on Tue, 01 Jun 2021 21:03:24 -0500
%X We experimentally study timing jitter of single-photon detection by NbN superconducting strips with width w ranging from 190 nm to 3μm. We find that timing jitter of both narrow (190 nm) and micron-wide strips is about 40 ps at currents where internal detection efficiency η saturates and it is close to our instrumental jitter. We also calculate intrinsic timing jitter in wide strips using the modified time-dependent Ginzburg-Landau equation coupled with a two-temperature model. We find that with increasing width the intrinsic timing jitter increases and the effect is most considerable at currents where a rapid growth of η changes to saturation. We relate it with complicated vortex and antivortex dynamics, which depends on a photon’s absorption site across the strip and its width. The model also predicts that at current close to depairing current the intrinsic timing jitter of a wide strip could be about ℏ/kBTc (Tc is a critical temperature of superconductor), i.e., the same as for a narrow strip.
%K NbN SSPD
%K SNSPD
%R 10.1103/PhysRevApplied.14.044041
%U https://link.aps.org/doi/10.1103/PhysRevApplied.14.044041
%U https://doi.org/10.1103/PhysRevApplied.14.044041
%P 044041 (1 to 8)