TY  - JOUR
AU  - Vodolazov, D. Y.
AU  - Manova, N. N.
AU  - Korneeva, Y. P.
AU  - Korneev, A. A.
PY  - 2020
DA  - 2020//
TI  - Timing jitter in NbN superconducting microstrip single-photon detector
T2  - Phys. Rev. Applied
JO  - Phys. Rev. Applied
SP  - 044041 (1 to 8)
VL  - 14
IS  - 4
KW  - NbN SSPD
KW  - SNSPD
AB  - 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.
SN  - 2331-7019
UR  - https://link.aps.org/doi/10.1103/PhysRevApplied.14.044041
UR  - https://doi.org/10.1103/PhysRevApplied.14.044041
DO  - 10.1103/PhysRevApplied.14.044041
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1788), last updated on Tue, 01 Jun 2021 21:03:24 -0500
ID  - Vodolazov_etal2020
ER  -