Tuning refractive index change of SiNx induced by ultrafast laser pulses Gholamreza Shayeganrad, Martynas Beresna, Thalia Domínguez Bucio, Gilberto Brambilla and Fredric Y. Gardes EPJ Web Conf., 307 (2024) 02021 Published online: 18 October 2024 DOI: 10.1051/epjconf/202430702021