Constructive feedback for the growth of laser‐induced periodic surface structures. Issue 2 (29th January 2016)

• Record Type: Journal Article
• Authors: Déziel, Jean‐Luc; Dumont, Joey; Gagnon, Denis; Dubé, Louis J.; Messaddeq, Sandra H.; Messaddeq, Younès
• Other Names: Silva Carlos sponsoringEditor.; Kashyap Raman sponsoringEditor.
• Is Part Of: Physica status solidi. Volume 13:Issue 2/3(2016:Mar.)
• Page Start: 121
• Page End: 124
• Publication Date: 2016-01-29
• Subjects: nanostructures -- plasma -- FDTD -- feedback; Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201510146
• Languages: English
• ISSNs: 1862-6351

Abstract

Abstract: We study the formation and growth of laser‐induced periodic surface structures (LIPSSs) with the finite‐difference time‐domain (FDTD) method. We use a recently proposed inter‐pulse feedback method to account for the evolution of the surface morphology between each laser pulse sent to the surface of the processed material. This method has been used with an ablation‐like mechanism, by removing material exposed to a light intensity higher than a given threshold. We propose an inverse mechanism, an expansion‐like mechanism, able to grow structures that the ablation‐like process cannot. This allows us to introduce the notions of constructive and destructive feedback and explains a strong contradiction between the standard Sipe‐Drude theory and the experimental observations, i.e. the formation on metals of structures usually linked to wide band gap dielectrics. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)