Ultrabroadband Entangled Photons on a Nanophotonic Chip

Usman A. Javid, Jingwei Ling, Jeremy Staffa, Mingxiao Li, Yang He, and Qiang Lin
Phys. Rev. Lett. 127, 183601 – Published 27 October 2021
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Abstract

The development of quantum technologies on nanophotonic platforms has seen momentous progress in the past decade. Despite that, a demonstration of time-frequency entanglement over a broad spectral width is still lacking. Here we present an efficient source of ultrabroadband entangled photon pairs on a periodically poled lithium niobate nanophotonic waveguide. Employing dispersion engineering, we demonstrate a record-high 100 THz (1.2μm2μm) generation bandwidth with a high efficiency of 13GHz/mW and excellent noise performance with the coincidence-to-accidental ratio exceeding 105. We also measure strong time-frequency entanglement with over 98% two-photon interference visibility.

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  • Received 24 March 2021
  • Accepted 20 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.183601

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Usman A. Javid1,*, Jingwei Ling2,*, Jeremy Staffa1, Mingxiao Li2, Yang He2, and Qiang Lin1,2,†

  • 1Institute of Optics, University of Rochester, Rochester, New York 14627, USA
  • 2Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA

  • *These authors contributed equally to this work.
  • qiang.lin@rochester.edu

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Issue

Vol. 127, Iss. 18 — 29 October 2021

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