Spontaneous parametric down-conversion in ultrathin samples
Chekhova MV (2024)
Publication Type: Conference contribution
Publication year: 2024
Publisher: SPIE
Book Volume: 13004
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Strasbourg, FRA
ISBN: 9781510673267
DOI: 10.1117/12.3016302
Abstract
Miniaturization of nonlinear optical elements is one of the major trends of modern photonics. In particular, in the ‘flat-optics’ geometry, the sample is ultrathin along the light propagation direction. For nonlinear optical effects in such samples, phase matching is satisfied automatically, which allows for the use of materials with giant nonlinear susceptibilities. The tiny thickness reduces the efficiency but it can be compensated for by using geometric and material resonances. Recently also spontaneous parametric down-conversion (SPDC), leading to the generation of entangled photons, has been implemented in ultrasmall sources: subwavelength layers, metasurfaces, even nanoantennas. The lifted constraint of phase matching gives to SPDC even more freedom than to classical frequency conversion effects. The reason is that SPDC, as a spontaneous effect, is stimulated by quantum vacuum fluctuations, which populate all modes uniformly. SPDC in ultrathin samples demonstrates very broad spectral and angular width, extremely high degrees of continuous-variable entanglement, tunable polarization entanglement, and orders of magnitude enhancement of photon pair production rate due to the geometric resonances of dielectric metasurfaces.
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APA:
Chekhova, M.V. (2024). Spontaneous parametric down-conversion in ultrathin samples. In John M. Dudley, Anna C. Peacock, Birgit Stiller, Giovanna Tissoni (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Strasbourg, FRA: SPIE.
MLA:
Chekhova, Maria V.. "Spontaneous parametric down-conversion in ultrathin samples." Proceedings of the Nonlinear Optics and its Applications 2024, Strasbourg, FRA Ed. John M. Dudley, Anna C. Peacock, Birgit Stiller, Giovanna Tissoni, SPIE, 2024.
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