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Timing jitter in NbN superconducting microstrip single-photon detector
Vodolazov, D. Y., Manova, N. N., Korneeva, Y. P., & Korneev, A. A. (2020). Timing jitter in NbN superconducting microstrip single-photon detector. Phys. Rev. Applied, 14(4), 044041 (1 to 8).
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.
Timing jitter in NbN superconducting microstrip single-photon detectorVodolazov, D.Y.Manova, N.N.Korneeva, Y.P.Korneev, A.A.info:doi/10.1103/PhysRevApplied.14.044041openurl:?ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fhttps%3A%2F%2Fdb.rplab.ru%2Frefbase%2F&genre=article&atitle=Timing%20jitter%20in%20NbN%20superconducting%20microstrip%20single-photon%20detector&title=Phys.%20Rev.%20Applied&stitle=Phys.%20Rev.%20Applied&issn=2331-7019&date=2020&volume=14&issue=4&spage=044041%20%281%20to%208%29&aulast=Vodolazov&aufirst=D.%20Y.&au=Manova%2C%20N.%20N.&au=Korneeva%2C%20Y.%20P.&au=Korneev%2C%20A.%20A.&id=info%3Adoi%2F10.1103%2FPhysRevApplied.14.044041&sid=refbase%3ARpLabcitekey:Vodolazov_etal2020Vodolazov, D. Y., Manova, N. N., Korneeva, Y. P., & Korneev, A. A. (2020). Timing jitter in NbN superconducting microstrip single-photon detector. Phys. Rev. Applied, 14(4), 044041 (1 to 8).2020JournalArticletextNbN SSPD, SNSPDurl:https://link.aps.org/doi/10.1103/PhysRevApplied.14.0440412331-7019Phys. Rev. Applied2020144044041