Author:
Clementi Marco,Zhou Ji,Hu Jianqi,Yakar Ozan,Nitiss Edgars,Stroganov Anton,Brès Camille-Sophie
Abstract
We 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.