Nonlinear Photoluminescence from Patterned ITO Thin Films Florian Dell’Ova, Konstantin Malchow, Nicolas Pocholle, Rémi Chassagon, Olivier Heintz, Gérard Colas des Francs, Erik Dujardin and Alexandre Bouhelier EPJ Web Conf., 287 (2023) 06013 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328706013