Micrometer-scale integrated silicon source of time-energy entangled photons

Grassani, Davide and Azzini, Stefano and Liscidini, Marco and Galli, Matteo and Strain, Michael J. and Sorel, Marc and Sipe, J. E. and Bajoni, Daniele (2015) Micrometer-scale integrated silicon source of time-energy entangled photons. Optica, 2 (2). pp. 88-94. ISSN 1899-7015 (https://doi.org/10.1364/OPTICA.2.000088)

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Abstract

Entanglement is a fundamental resource in quantum information processing. Several studies have explored the integration of sources of entangled states on a silicon chip, but the devices demonstrated so far require millimeter lengths and pump powers of the order of hundreds of milliwatts to produce an appreciable photon flux, hindering their scalability and dense integration. Microring resonators have been shown to be efficient sources of photon pairs, but entangled state emission has never been proven in these devices. Here we report the first demonstration, to the best of our knowledge, of a microring resonator capable of emitting time-energy entangled photons. We use a Franson experiment to show a violation of Bell’s inequality by more than seven standard deviations with an internal pair generation exceeding 10<sup>7</sup> Hz. The source is integrated on a silicon chip, operates at milliwatt and submilliwatt pump power, emits in the telecom band, and outputs into a photonic waveguide. These are all essential features of an entangled state emitter for a quantum photonic network.

ORCID iDs

Grassani, Davide, Azzini, Stefano, Liscidini, Marco, Galli, Matteo, Strain, Michael J. ORCID logoORCID: https://orcid.org/0000-0002-9752-3144, Sorel, Marc, Sipe, J. E. and Bajoni, Daniele;
  • Item type:Article
    ID code:54336
    Dates:
    Date
    Event
    26 January 2015
    Published
    20 November 2014
    Accepted
    Notes:© 2015 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
    Subjects:Science > Physics
    Department:University of Strathclyde > University of Strathclyde
    Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:22 Sep 2015 00:04
    Last modified:04 Nov 2024 06:00
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/54336
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