Laser Induced Periodic Surface Structures induced by surface plasmons coupled via roughness

Gurevich Evgeny L., Gurevich Svetlana V.

Abstract

Abstract In this paper the formation mechanisms of the femtosecond laser-induced periodic surface structures (LIPSS) are discussed. One of the most frequently used theories explains the structures by interference between the incident laser beam and surface plasmon-polariton waves. The latter is most commonly attributed to the coupling of the incident laser light to the surface roughness. We demonstrate that this excitation of surface plasmons contradicts the results of laser-ablation experiments. As an alternative approach to the excitation of \{LIPSS\} we analyse development of hydrodynamic instabilities in the melt layer.