Reducing g(2)(0) of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors.
Reducing g(2)(0) of a parametric down-conversion source via photon-number resolution with superconducting nanowire detectors.
复制标题
DOI：
10.1364/oe.450172
复制
发表时间：
2021-11
期刊：
影响因子：
3.8
通讯作者：
S. Sempere-Llagostera;G. Thekkadath;R. Patel;W. Kolthammer;I. Walmsley
中科院分区：
文献类型：
--
作者：
S. Sempere-Llagostera;G. Thekkadath;R. Patel;W. Kolthammer;I. Walmsley
多光子贡献对实现基于非线性过程的预示单光子源（HSPS）提出了重大挑战。在这项工作中，我们通过利用商用超导纳米线单光子探测器（SNSPD）的光子数分辨（PNR）能力来提高以这种方式产生的单光子的质量。我们报告g（2）（τ = 0）降低了13 ± 0.4%，即使光子源的收集效率仅为29.6%。我们的工作展示了SNSPD的PNR能力的第一个应用程序，并显示了HSPS的质量与广泛可用的技术的改进。
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.