Figure 2

Holes drilled in 100 µm thick steel foils by ablation using laser pulses with the following parameters: (a) pulse width: 200 fs, pulse energy: 120 µJ, fluence: 0.5 J cm⁻², wavelength: 780 nm; and (b) pulse width: 3.3 ns, pulse energy: 1 mJ, fluence: 4.2 J cm⁻², wavelength: 780 nm. The scale bars represent 30 µm.⁴⁵ Reproduced with permission from Springer. ©1996 by Springer.