Entangled photons from subwavelength nonlinear films
Santiago-Cruz T, Sultanov V, Zhang H, Krivitsky LA, Chekhova M (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 46
Pages Range: 653-656
Journal Issue: 3
DOI: 10.1364/OL.411176
Abstract
Miniaturized entangled photon sources, in particular based on subwavelength metasurfaces, are highly demanded for the development of integrated quantum photonics. Here, as a first step towards the development of quantum optical metasurfaces (QOMs), we demonstrate generation of entangled photons via spontaneous parametric down-conversion (SPDC) from subwavelength films. We achieve photon pair generation with a high coincidence-to-accidental ratio in lithium niobate and gallium phosphide nanofilms. By implementing the fiber spectroscopy of SPDC in nanofilms, we measure a spectrum with a bandwidth of 500 nm, limited only by the overall detection efficiency. The spectrum reveals vacuum field enhancement due to a Fabry-Perot resonance inside the nonlinear films. It also suggests a strategy for observing SPDC from QOM. Our experiments lay the groundwork for future development of flat SPDC sources, including QOM. (C) 2021 Optical Society of America
Authors with CRIS profile
Involved external institutions
Agency for Science, Technology and Research (A*STAR)
Singapore (SG)
Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light
Germany (DE)
Singapore (SG)
Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light
Germany (DE)
How to cite
APA:
Santiago-Cruz, T., Sultanov, V., Zhang, H., Krivitsky, L.A., & Chekhova, M. (2021). Entangled photons from subwavelength nonlinear films. Optics Letters, 46(3), 653-656. https://dx.doi.org/10.1364/OL.411176
MLA:
Santiago-Cruz, Tomas, et al. "Entangled photons from subwavelength nonlinear films." Optics Letters 46.3 (2021): 653-656.
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