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10 March 2020 Parametric down-conversion in semiconductor metasurfaces (Conference Presentation)
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Proceedings Volume 11290, High Contrast Metastructures IX; 112900L (2020)
Event: SPIE OPTO, 2020, San Francisco, California, United States
We demonstrate photon-pair generation via spontaneous parametric down-conversion (SPDC) from two types of metasurfaces composed by AlGaAs nanocylinders: 1) monolithically fabricated on a selectively oxidized layer of AlAs epitaxially grown on a GaAs wafer; 2) fabricated by reporting the AlGaAs nanostructures on a transparent wafer via wafer bonding. In these samples, we observed SPDC both in back- and forward-scattering configurations, under excitation with a CW pump around 775 nm and single-photon detection on the signal and idler channels. The Bragg modulation of Mie-resonances enables paraxial SPDC, which demonstrates the potential of all-dielectric metasurfaces for quantum applications like on-axis quantum imaging.
Conference Presentation
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Giuseppe Marino, Adrien Borne, Carlo Gigli, Aristide Lemaître, Alberto Artioli, Jean-Michel Gérard, and Giuseppe Leo "Parametric down-conversion in semiconductor metasurfaces (Conference Presentation)", Proc. SPIE 11290, High Contrast Metastructures IX, 112900L (10 March 2020);

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