On-chip quantum interference with heralded photons from two independent micro-ring resonator sources in silicon photonics

Imad I. Faruque*, Gary F. Sinclair, Damien Bonneau, John G. Rarity, Mark G. Thompson

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

59 Citations (Scopus)
392 Downloads (Pure)

Abstract

High visibility on-chip quantum interference among indistinguishable single-photons from multiples sources is a key prerequisite for integrated linear optical quantum computing. Resonant enhancement in micro-ring resonators naturally enables brighter, purer and more indistinguishable single-photon production without any tight spectral filtering. The indistinguishability of heralded single-photons from multiple micro-ring resonators has not been measured in any photonic platform. Here, we report on-chip indistinguishability measurements of heralded single-photons generated from independent micro-ring resonators by using an on-chip Mach-Zehnder interferometer and spectral demultiplexer. We measured the raw heralded two-photon interference fringe visibility as 72 ± 3%. This result agrees with our model, which includes device imperfections, spectral impurity and multi-pair emissions. We identify multi-pair emissions as the main factor limiting the nonclassical interference visibility, and show a route towards achieving near unity visibility in future experiments.

Original languageEnglish
Pages (from-to)20379-20395
Number of pages17
JournalOptics Express
Volume26
Issue number16
Early online date26 Jul 2018
DOIs
Publication statusPublished - 6 Aug 2018

Research Groups and Themes

  • QETLabs
  • Bristol Quantum Information Institute
  • Photonics and Quantum

Keywords

  • Quantum optics
  • Integrated optics
  • Nonlinear optics

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  • Quantum Optics for Integrated Photonic Technologies

    Rarity, J. G. (Principal Investigator)

    16/06/1415/06/19

    Project: Research

  • Programme Grant: Engineering Photonic Quantum Technologies.

    Rarity, J. G. (Principal Investigator), O'Brien, J. L. (Principal Investigator), Thompson, M. G. (Co-Investigator), Erven, C. (Co-Investigator), Sahin, D. (Co-Investigator), Marshall, G. D. (Researcher), Barreto, J. (Co-Investigator), Jiang, P. (Collaborator), McCutcheon, W. D. (Researcher), Silverstone, J. W. (Researcher), Sinclair, G. F. (Researcher), Kling, L. (Engineer), Banerjee, A. (Researcher), Wang, J. (Researcher), Santagati, R. (Researcher), Borghi, M. (Researcher), Woodland, E. M. (Manager), Mawdsley, H. C. M. (Administrator) & Faruque, I. I. (Researcher)

    16/06/1415/06/19

    Project: Research, Parent

  • PICQUE (PHYS)

    O'Brien, J. L. (Principal Investigator)

    1/09/1331/08/17

    Project: Research, Parent

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