Self-Organised Voronoi Diagrams Generated by Single-shot Femtosecond Laser Ablation of Metal Surfaces.
Here we report on experimental studies of self-assembled Voronoi diagrams observed on the surface of laser-induced craters. The craters are left by means of single-shot femtosecond laser ablation of metal samples. The Voronoi cells appear in the melt layer which undergoes transition to overheated liquid, i.e. represents a system driven far from equilibrium. The pattern properties and mechanisms leading to its appearance are discussed. A possibility to control the position of the nodes of the Voronoi diagram is demonstrated.