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An efficient nanophotonic source of ultra-broadband entangled photons

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Abstract

We demonstrate ultra-broadband spontaneous parametric down-conversion over a 100 THz bandwidth using an on-chip dispersion-engineered periodically-poled lithium niobate waveguide. The source produces photon-pairs with an unprecedented 13 GHz/mW efficiency and a coincidence-to-accidental ratio exceeding 105.

© 2021 The Author(s)

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