info:eu-repo/semantics/article
Comparison of structural colors achieved by laser-induced periodic surface structures and direct laser interference patterning
Fecha
2020-09Registro en:
Soldera, Marcos Maximiliano; Fortuna, Franco; Teutoburg Weiss, Sascha; Milles, Stephan; Taretto, Kurt Rodolfo; et al.; Comparison of structural colors achieved by laser-induced periodic surface structures and direct laser interference patterning; Japan Laser Processing Soc; Journal Of Laser Micro/nanoengineering; 15; 2; 9-2020; 97-103
1880-0688
CONICET Digital
CONICET
Autor
Soldera, Marcos Maximiliano
Fortuna, Franco
Teutoburg Weiss, Sascha
Milles, Stephan
Taretto, Kurt Rodolfo
Lasag, Andrés Fabian
Resumen
Engraving surfaces with holographic features is not only used for decorative applications, but also for protecting products from counterfeit and piracy. Tins structural coloration can be produced on large areas at high-throughput using laser-based methods such as Direct Laser Interference Pat- terning and Laser-Induced Periodic Surface Structuring (LIPSS). hi this contribution, both technol- ogies were used to generate diffraction gratings on stainless steel with different processing parame- ters. Then, the resulting spectral reflectances were quantitatively compared and correlated to topo- graphical characteristics determined by scanning electron microscopy and atomic force microscopy. Overall, the DLIP treated samples showed up to 42% higher diffuse reflectivity than the LIPSS samples when illuminated with a green laser diode. However, the LIPSS textures were less spectral dependent, probably due to their broader distribution of spatial periods and structure heights. These findings could also be appreciated with the naked eye as the samples patterned with LIPSS have a matte aspect with a homogeneous coloration, whereas the DLIP samples had a glossy appearance with brighter colors.