INVESTIGADORES
TARETTO kurt rodolfo
artículos
Título:
Comparison of structural colors achieved by laser-induced periodic surface structures and direct laser interference patterning
Autor/es:
SOLDERA, MARCOS; FORTUNA, FRANCO; TEUTOBURG-WEISS, SASCHA; MILLES, STEPHAN; TARETTO, KURT; LASAG, ANDRÉS FABIAN
Revista:
JOURNAL OF LASER MICRO/NANOENGINEERING
Editorial:
JAPAN LASER PROCESSING SOC
Referencias:
Año: 2020 vol. 15 p. 97 - 103
ISSN:
1880-0688
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.