Microfabrication and surface functionalization of soda lime glass through direct laser interference patterning

• Autores: Soldera, Marcos Maximiliano; Alamri, Sabri; Sürmann, Paul Alexander; Kunze, Tim; Lasagni, Andrés Fabián
• Año de publicación: 2021
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: DIFFRACTION GRATINGS; DIRECT LASER INTERFERENCE PATTERNING; GLASS MICRO-STRUCTURING; LASER-INDUCED PERIODIC SURFACE STRUCTURES; MULTI-PHOTON ABSORPTION; WETTABILITY
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

All-purpose glasses are common in many established and emerging industries, such as microelectronics, photovoltaics, optical components, and biomedical devices due to their outstanding combination of mechanical, optical, thermal, and chemical properties. Surface functionalization through nano/micropatterning can further enhance glasses’ surface properties, expanding their applicability into new fields. Although laser structuring methods have been successfully employed on many absorbing materials, the processability of transparent materials with visible laser radiation has not been intensively studied, especially for producing structures smaller than 10 µm. Here, interference-based optical setups are used to directly pattern soda lime substrates through non-lineal absorption with ps-pulsed laser radiation in the visible spectrum. Line-and dot-like patterns are fabricated with spatial periods between 2.3 and 9.0 µm and aspect ratios up to 0.29. Furthermore, laserinduced periodic surface structures (LIPSS) with a feature size of approximately 300 nm are visible within these microstructures. The textured surfaces show significantly modified properties. Namely, the treated surfaces have an increased hydrophilic behavior, even reaching a super-hydrophilic state for some cases. In addition, the micropatterns act as relief diffraction gratings, which split incident light into diffraction modes. The process parameters were optimized to produce high-quality textures with super-hydrophilic properties and diffraction efficiencies above 30%.
Fil: Soldera, Marcos Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas. Universidad Nacional del Comahue. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas; Argentina
Fil: Alamri, Sabri. Fraunhofer Institute For Material And Beam Technology Iws; Alemania
Fil: Sürmann, Paul Alexander. Fraunhofer Institute For Material And Beam Technology Iws; Alemania
Fil: Kunze, Tim. Fraunhofer Institute For Material And Beam Technology Iws; Alemania
Fil: Lasagni, Andrés Fabián. Technische Universität Dresden; Alemania