Imaging spatiotemporal Hong-Ou-Mandel interference of biphoton states of extremely high Schmidt number

Devaux, F. , Mosset, A. , Moreau, P.-A. and Lantz, E. (2020) Imaging spatiotemporal Hong-Ou-Mandel interference of biphoton states of extremely high Schmidt number. Physical Review X, 10(3), 031031. (doi: 10.1103/PhysRevX.10.031031)

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Abstract

We report the experimental observation of a spatiotemporal Hong-Ou-Mandel (HOM) interference of biphoton states of extremely high Schmidt number. Two-photon interference of 1500 spatial modes and a total of more than 3 × 10 6 spatiotemporal modes is evidenced by measuring momentum spatial coincidences, without any prior selection of the photons in time and space coincidence, between the pixels of the far-field images of two strongly multimode spontaneous parametric down-conversion (SPDC) beams propagating through a HOM interferometer. The outgoing SPDC beams are recorded on two separate detector arrays operating in the photon-counting regime. The properties of HOM interference are investigated both in the time and space domains. We show that the two-photon interference exhibits temporal and two-dimensional spatial HOM dips with visibilities of 60% and widths in good agreement with the spatiotemporal coherence properties of the biphoton state. Moreover, we demonstrate that maxima of momentum spatial coincidences are evidenced within each image, in correspondence with these dips.

Item Type:Articles
Additional Information:This work was partly supported by the French “Investissements d’Avenir” program, Project ISITE-BFC (Contract No. ANR-15-IDEX-03).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Moreau, Dr Paul-Antoine
Authors: Devaux, F., Mosset, A., Moreau, P.-A., and Lantz, E.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review X
Publisher:American Physical Society
ISSN:2160-3308
ISSN (Online):2160-3308
Published Online:11 August 2020
Copyright Holders:Copyright © 2020 American Physical Society
First Published:First published in Physical Review X 10(3): 031031
Publisher Policy:Reproduced under a Creative Commons License

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