Directionality of nonlinear emission from a dielectric metasurface is controlled by fine-tuning the relative time delay and polarization of two pulsed pump beams.
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Grinblat, G. Light routing by nanoscale nonlinear interferometry with attosecond control. Nat. Nanotechnol. 19, 267–268 (2024). https://doi.org/10.1038/s41565-023-01555-4
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DOI: https://doi.org/10.1038/s41565-023-01555-4