Dejen, B; Vaquero-Stainer, A; Santana, T S; Arabskyj, L; Dolan, P R; Chunnilall, C J (2024) A refined method for characterization of afterpulse probability in single-photon avalanche diodes. Applied Physics Letters, 125 (19). 194002

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Abstract

Single-photon avalanche diodes (SPADs) are ubiquitous in many low-light-level sensing applications and are key components in many photonic quantum information devices. For these, it is often necessary that a full characterization of the SPAD is performed, for which a key metric is the afterpulse probability. In this paper, we present a comparison of two methods used to characterize afterpulse probability: synchronized and non-synchronized. We show that the methods are inconsistent with one another, and we present an analysis for the non-synchronized method which leads to better agreement. We use this to explore the dependence of afterpulse probability on photon flux and highlight limitations on the experimental conditions under which afterpulse probability can be reliably characterized using these methods.

Item Type:	Article
Subjects:	Optical Radiation and Photonics > Few Photon Science
Divisions:	Quantum Technologies
Identification number/DOI:	doi.org/10.1063/5.0226118
Last Modified:	14 May 2025 13:33
URI:	https://eprintspublications.npl.co.uk/id/eprint/10164