Direct color printing on Ag:TiO_2 thin films induced by nanosecond laser pulses

Van Doan Le; Balint Eles; Nicolas Dalloz; Manuel A. Flores Figueroa; Francis Vocanson; Yaya Lefkir; Nathalie Destouches

doi:10.1117/12.2632435

3 October 2022 Direct color printing on Ag:TiO₂ thin films induced by nanosecond laser pulses

Van Doan Le, Balint Eles, Nicolas Dalloz, Manuel A. Flores Figueroa, Francis Vocanson, Yaya Lefkir, Nathalie Destouches

Proceedings Volume 12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX; 1220207 (2022) https://doi.org/10.1117/12.2632435
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

Laser can be an effective tool to modify materials at the nanoscale in order to achieve desired optical properties. When dealing with metal-dielectric nanocomposite thin films, different mechanisms can be triggered by laser on large areas to control the statistical properties of these materials. Nanoparticles can be reshaped, resized and ordered according to self-organization mechanisms that set over micrometer wide areas. The dielectric crystal phase and film thickness can be changed upon laser-induced temperature rise. These mechanisms lead to changes in the optical properties of the films. Here, we investigate the structural changes that a Ag:TiO₂ nanocomposite thin film undergoes under nanosecond laser scanning and their resulting optical properties. We especially focus on the color properties in different modes of observation such as reflection and diffraction. The colors originate from combination of absorption by the localized surface plasmon resonance of metallic nanoparticles, diffraction by the nanoparticles assemblies and interference between the incident, reflected and guided waves, the latter being excited by scattering on the nanoparticles. The morphological characterizations unveil the role of nanoparticle size, density and arrangement on the transition from a diffractive to a dichroic behavior. A full color image is also drawn to demonstrate the potential of the technique in industrial applications ranging from design, coloration to information storage and data security.

Citation Download Citation

Van Doan Le, Balint Eles, Nicolas Dalloz, Manuel A. Flores Figueroa, Francis Vocanson, Yaya Lefkir, and Nathalie Destouches "Direct color printing on Ag:TiO₂ thin films induced by nanosecond laser pulses", Proc. SPIE 12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX, 1220207 (3 October 2022); https://doi.org/10.1117/12.2632435

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KEYWORDS

Particles

Nanostructures

Nanoparticles

Silver

Reflection

Polarization

Thin films

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