The optimization of thin Sb2Te3 films in order to obtain giant ultrafast optical nonlinearities is reported. The ultrafast nonlinearities of the thin film layers are studied by the Z-scan technique. Giant saturable absorption is obtained, which is the highest ever reported, by means of the Z-scan technique.
C. Moisset, R. Verrone, A. Bourgade, G. T. Zeweldi, M. Minissale, L. Gallais, C. Perrin-Pellegrino, H. Akhouayri, J. Lumeau, J. Natoli and K. Iliopoulos, Nanoscale Adv., 2020, 2, 1427 DOI: 10.1039/C9NA00796B
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