Fig. 1. Schematics of laser processing system and drop impact experiment. (a) Laser processing system; (b) drop impact experiment

Fig. 2. Surface morphology of typical structures prepared with laser with different pulse widths (the laser pulse energy, laser scanning speed and laser scanning interval are 160 μJ,10 mm/s and 10 μm, respectively). (a1)--(d1) SEM images; (a2)--(d2) high-magnification of SEM images; (a3)--(d3) surface 3D height map of the structure; (a4)--(d4) cross-section profiles along the black dotted lines in the 3D height map

Fig. 3. Sliding angle and adhesive force of different samples

Fig. 4. Snapshots of impacting droplets on typical samples surface

Fig. 5. Solid-liquid contact times of each sample at droplet impact with three different Weber numbers