Reducing g(2)(0) of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors
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Thekkadath, GS
Patel, RB
Kolthammer, WS
Walmsley, IA
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Abstract
Multiphoton contributions pose a significant challenge for the realisation of heralded single-photon sources (HSPS) based on nonlinear processes. In this work, we improve the quality of single photons generated in this way by harnessing the photon-number resolving (PNR) capabilities of commercial superconducting nanowire single-photon detectors (SNSPDs). We report a 13 ± 0.4% reduction of g(2)(τ = 0), even with a collection efficiency in the photon source of only 29.6%. Our work demonstrates the first application of the PNR capabilities of SNSPDs and shows improvement in the quality of an HSPS with widely available technology.
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Optics Express
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30
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2
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© 2022 The Authors. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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Communications engineering
Atomic, molecular and optical physics
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Physical Sciences
Optics
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Sempere-Llagostera, S; Thekkadath, GS; Patel, RB; Kolthammer, WS; Walmsley, IA, Reducing g(2)(0) of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors, Optics Express, 2022, 30 (2), pp. 3138-3147