Formation of nanostructures upon laser ablation of a binary Six(SiO2)1-x mixture

The formation efficiency of fractal nanostructures is studied experimentally depending on the composition of the binary silicon – silica mixture during evaporation by millisecond laser pulse. The influence of percolation on the efficiency of nanostructure formation in a laser plume is discovered. It is found that the efficiency is maximal near the critical densities of atoms in the plasma, which correspond both to the three-dimensional and two-dimensional percolation. The dependences of the effective temperatures of the laser plasma and the intensity of spectral lines on the target composition are presented.