利用非理想单光子源的Hong-Ou-Mandel干涉

Hong-Ou-Mandel Interference with Imperfect Single Photon Sources.

作者信息

Ollivier H, Thomas S E, Wein S C, de Buy Wenniger I Maillette, Coste N, Loredo J C, Somaschi N, Harouri A, Lemaitre A, Sagnes I, Lanco L, Simon C, Anton C, Krebs O, Senellart P

机构信息

Centre for Nanosciences and Nanotechnology, CNRS, Université Paris-Saclay, UMR 9001, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.

Institute for Quantum Science and Technology and Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada T2N 1N4.

出版信息

Phys Rev Lett. 2021 Feb 12;126(6):063602. doi: 10.1103/PhysRevLett.126.063602.

DOI:10.1103/PhysRevLett.126.063602

PMID:33635709

Abstract

Hong-Ou-Mandel interference is a cornerstone of optical quantum technologies. We explore both theoretically and experimentally how unwanted multiphoton components of single-photon sources affect the interference visibility, and find that the overlap between the single photons and the noise photons significantly impacts the interference. We apply our approach to quantum dot single-photon sources to access the mean wave packet overlap of the single-photon component. This study provides a consistent platform with which to diagnose the limitations of current single-photon sources on the route towards the ideal device.

摘要

Hong-Ou-Mandel干涉是光量子技术的基石。我们通过理论和实验探究了单光子源中不需要的多光子成分如何影响干涉可见度，并发现单光子与噪声光子之间的重叠对干涉有显著影响。我们将我们的方法应用于量子点单光子源，以获取单光子成分的平均波包重叠。这项研究提供了一个一致的平台，用以诊断当前单光子源在通往理想器件道路上的局限性。