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20 August 2020 Generation and shaping of quantum photon-pair states in nonlinear metasurfaces
Andrey A. Sukhorukov
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Proceedings Volume 11461, Active Photonic Platforms XII; 114611Z (2020) https://doi.org/10.1117/12.2567796
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
We present theoretical and experimental advances on photon-pair generation through spontaneous parametric down-conversion (SPDC) in nonlinear nanostructures and metasurfaces, underpinning quantum entanglement engineering at sub-wavelength scale for photon shaping with tailored polarization and spatial correlations. We derive explicit theoretical expressions for the measurable photon counts and quantum correlations, incorporating material dispersion and absorption characteristics [Phys. Rev. Lett. 117, 123901 (2016)], and demonstrate experimentally the generation of quantum heralded photon pairs from a single AlGaAs nanodisk [Optica 6, 1416 (2019)]. We further reveal the opportunities to enhance the generation rate through high-Q resonances including bound states in the continuum [doi:10.1117/12.2539888 (2019)]. We also outline the applications of metasurfaces for the manipulation and measurement of multi-photon quantum states for free-space quantum imaging and communications.
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Andrey A. Sukhorukov "Generation and shaping of quantum photon-pair states in nonlinear metasurfaces", Proc. SPIE 11461, Active Photonic Platforms XII, 114611Z (20 August 2020); https://doi.org/10.1117/12.2567796
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KEYWORDS
Photon polarization
Absorption
Dispersion
Free space optics
Nanostructures
Photon counting
Polarization
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