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TOM6 S03a: Novel nonlinear waveguides and materials
Time:
Thursday, 14/Sept/2023:
10:30am - 11:00am
Session Chair: Tiff Brydges, University of Geneva, Switzerland
Location:Santenay/Chablis
Presentations
10:30am - 10:45am ID: 203 / TOM6 S03a: 1 TOM 6 Nonlinear and Quantum Optics
Nonlinear photoluminescence from patterned ITO thin films
Florian Dell'Ova, Konstantin Malchow, Nicolas Pocholle, Rémi Chassagnon, Olivier Heintz, Gérard Colas Des Francs, Erik Dujardin, Alexandre Bouhelier
Laboratoire ICB UMR 6303 - Université de Bourgogne, France
ITO is a transparent conductive material commonly used in everyday life and for its potential in material research. In nonlinear optics for instance, ITO has shown great capabilities for harmonic generation in its epsilon-near-zero configuration. In this article, we demonstrate a completely new nonlinear behaviour from ITO thin layers. After a Ga-Focused Ion Beam (FIB) milling of the thin film, we observe nonlinear photoluminescence produced for tightly focused femtosecond pulses. The signal shares strong similarities with that commonly detected from noble metals. We show that the arising of this nonlinear photoluminescence originates from the radiative decay of metal-like hot electron distribution in the material and is associated to a modification of the optical properties by the Ga ions.