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  • Title: High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides.
    Author: Zhao J, Ma C, Rüsing M, Mookherjea S.
    Journal: Phys Rev Lett; 2020 Apr 24; 124(16):163603. PubMed ID: 32383916.
    Abstract:
    A thin-film periodically poled lithium niobate waveguide was designed and fabricated which generates entangled photon pairs at telecommunications wavelengths with high coincidences-to-accidentals counts ratio CAR>67000, two-photon interference visibility V>99%, and heralded single-photon autocorrelation g_{H}^{(2)}(0)<0.025. Nondestructive in situ diagnostics were used to determine the poling quality in 3D. Megahertz rates of photon pairs were generated by less than a milliwatt of pump power, simplifying the pump requirements and dissipation compared to traditional spontaneous parametric down-conversion lithium niobate devices.
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