High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides
Jie Zhao, Chaoxuan Ma, Michael Rüsing, Shayan Mookherjea
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.
Topics & Concepts
Lithium niobateMaterials sciencePhotonOpticsSpontaneous parametric down-conversionPolingOptoelectronicsWaveguideWavelengthPhoton entanglementThin filmQuantum entanglementPhysicsFerroelectricityQuantumNanotechnologyDielectricQuantum mechanicsPhotorefractive and Nonlinear OpticsPhotonic and Optical DevicesQuantum optics and atomic interactions