Speaker: Prof. Arnaud Weck (University of Ottawa)

Date and time: Wednesday, June 17, 1:30 p.m. (heure de l'Est)

Title: Ultrafast Laser Processing: Micromachining and Texturing

Abstract
Ultrafast lasers have emerged as a powerful tool for advanced manufacturing. Their short pulse duration, high peak power, and high repetition rate enable high-precision processing over large areas while minimizing damage to surrounding material. For these reasons, ultrafast lasers have found many industrial applications requiring advanced material processing. In this talk, I will present work from my research group on ultrafast laser-induced material modifications for colour generation, and micromachining across various materials. I will demonstrate how laser-generated surface structures can produce vivid colours on silver and copper through a complex interplay of surface morphology, chemistry, and surface plasmons. Similarly, ultrafast lasers were used to tailor the optical response of polymer nanocomposites, generating structural colours within the bulk by activating surface plasmons at embedded nanoparticles. Beyond colouration, ultrafast lasers provide precise control over material removal, from precision cuts to creating smooth cavities and high-aspect-ratio features. I will conclude by discussing the broader impact of ultrafast laser technologies, particularly their potential to support a more sustainable environment through material processing applications. 

Au plaisir de vous y voir!