Intrinsic Timing Jitter and Latency in Superconducting Nanowire Single-photon Detectors
J.P. Allmaras, A.G. Kozorezov, B.A. Korzh, K.K. Berggren, M.D. Shaw · Physical Review Applied · 2019
The topic of latency in superconducting nanowire single-photon detectors (SNSPDs, the fastest type of such sensors) is of interest for understanding the absolute limits of timing performance in these devices, but so far no model of the detection mechanism could quantitatively explain recent measurements of intrinsic jitter and latency. This analysis of the connection between detector latency and timing jitter in the presence of Fano fluctuations and spatial nonuniformity provides a framework for studying the intrinsic jitter in SNSPDs, and suggests that intrinsic jitter could be reduced by enhancing scattering to suppress superconductivity as quickly as possible.