Figure 4.

Fractal dimensionality, “lake” surface area and lake number vs. laser fluence. (a) Surface -fractal dimensionality calculated with four different fractal analytical methodologies. Colors, symbols and lines to assist the eye: blue squares for partitioning (PA), purple spheres for power spectrum (PS), dark yellow stars for cube counting (CC), green triangles for triangulation (TR), and brown pentagons for atomic force microscopy (AFM) “lake” pattern (LA). The five methods show a similar fractality trend vs. laser fluence; (b) “lake” surface area vs. the number of lakes at different number of laser pulses (laser fluence).