Figure 2

The plot of (a) the sag height, H, (b) the diameter, D and (c) the material removal volume, V, versus the etch time, te, at a laser fluence of 9.46 J/cm2 (the delay of the double pulse is 350 fs; the energy distribution ratio is 1:1).
The plot of (a) the sag height, H, (b) the diameter, D and (c) the material removal volume, V, versus the etch time, te, at a laser fluence of 9.46 J/cm2 (the delay of the double pulse is 350 fs; the energy distribution ratio is 1:1).