On August 27, 2024, Dr. Erwan Lucas from CNRS – Laboratoire ICB, delivered an invited presentation at Europhoton 2024. His talk, titled “Meta-Dispersion for Microcomb Spectral Design in Photonic-Crystal Rings”, introduced the principles behind the M-Engine comb design and highlighted how tailored dispersion engineering can be used to shape microcomb spectra in integrated photonic platforms.