Clementi, MarcoZhou, JiHu, JianqiYakar, OzanNitiss, EdgarsStroganov, AntonBrès, Camille Sophie2025-01-262025-01-262025-01-25202410.1364/cleo_fs.2024.fth5b.72-s2.0-85215080938https://infoscience.epfl.ch/handle/20.500.14299/245202We show how spatiotemporal quasi-phase-matching emerges from all-optical poling of silicon nitride microresonators. Enabled by the coherent photogalvanic effect, the photoinduced χ(2) grating oscillates in space and time, yielding quasi-phase-matched and Doppler-shifted second-harmonic generation.falseElectro-optic effectsFrequency conversionGratingsMicrocavitiesPhotovoltaic effectsSilicon nitrideSpatiotemporal phenomenatext::conference output::conference proceedings::conference paper