Boonsit, S., Karam, L., Adamietz, F., Bourgeois, L., Nedeljkovic, M., Courjal, N., Dussauze, M., Murugan, G. S. (2026). Sustained poling-induced second-order optical nonlinearity in sodium-doped amorphous niobium oxide waveguides. Scientific Reports. https://doi.org/10.1038/s41598-026-45779-5