Enhancing the production of photonic Cooper pairs from room-temperature Raman scattering

ORAL

Abstract

Raman scattering may generate entangled photon pairs when the same excitation created during a Stokes process is annihilated by another incoming photon. This correlated Stokes-anti-Stokes (SaS) process can also occur due to the exchange of virtual phonons and the entangled photon pairs generated in this way are called photonic cooper pairs [1].

So far the SaS experiments are focused on coincidence measurements yielding large zero-time second-order correlation g(2)(0). While this demonstrates that the SaS process is a nonclassical phenomenon, it does not allow the quantification of entanglement for quantum optics applications. Here we describe a theory that shows that photonic Cooper pairs can be used for the generation of a multimode-squeezed state and heralded single-photon emission.

Our theory predicts the enhancement of photonic Cooper pair generation in the presence of Surface Enhanced Raman Scattering (SERS). Not all SERS enhancement mechanisms favor the generation of photonic cooper pairs at room temperature. Only those tailored to increase the anti-Stokes intensity relative to the Stokes one may lead to efficient entangled photon production.

*We acknowledge the support of the Government of Canada's New Frontiers in Research Fund (NFRF), [NFRFE-2019-01104] and the NSERC CREATE program (543245-2020).

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Presenters

  • Sanker Timsina

    • Department of Physics and Astronomy , Centre for Advanced Materials and Related Technology,University of Victoria, Victoria, British Columbia V8W 2Y2, Canada

Authors

  • Sanker Timsina

    • Department of Physics and Astronomy , Centre for Advanced Materials and Related Technology,University of Victoria, Victoria, British Columbia V8W 2Y2, Canada

  • Filomeno S. de Aguiar Júnor

    • Department of Chemistry, Centre for Advanced Materials and Related Technology,University of Victoria, Victoria, British Columbia V8W 2Y2, Canada

  • Sahar Gholami Milani

    • Department of Physics and Astronomy, Centre for Advanced Materials and Related Technology, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada

  • Alexandre Brolo

    • Department of Chemistry, Centre for Advanced Materials and Related Technology, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada

  • Rogério de Sousa

    • University of Victoria
    • Department of Physics and Astronomy, Centre for Advanced Materials and Related Technology, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada
    • Dept. of Physics and Astronomy, and Centre for Advanced Materials and Related Technology, University of Victoria, British Columbia, Canada