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High-Efficiency Second Harmonic Generation in Heterogeneously-Integrated Periodically-Poled Lithium Niobate on Silicon Nitride

par Vandekerckhove, Tom ;Vanackere, Tom ;De Witte, Jasper;Lufungula, Isaac Luntadila;Vissers, Ewoud;Roelkens, Gunther;Clemmen, Stéphane ;Kuyken, Bart
Référence Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2023) and European Quantum Electronics Conference (EQEC 2023), Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2023) and European Quantum Electronics Conference (EQEC 2023), Optica Publishing Group, page (cd_3_2)
Publication Publié, 2023-06-30

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Résumé :

Wavelength conversion processes such as spontaneous parametric down conversion (SPDC) and optical parametric amplification (OPA) are key elements in integrated quantum optics. On-chip integration of these function-alities would allow for increased performance and huge scaling opportunities. However, CMOS-compatible plat-forms such as silicon and silicon nitride (SiN) lack a $chi$(2) nonlinearity due to their inversion symmetry. This work provides a solution by heterogeneously integrating periodically poled lithium niobate (PPLN) onto SiN waveguides through micro-transfer printing (textmuTP) [1]. The textmuTP method is a scalable back-end process, allowing the fabrication of the photonic integrated circuit to remain CMOS-compatible.