Research / 2018 / Article / Fig 7

Research Article

Structure-Mediated Excitation of Air Plasma and Silicon Plasma Expansion in Femtosecond Laser Pulses Ablation

Figure 7

Pulse number-dependent expansion distance of the silicon shockwave. (a–b) Pulse number-dependent longitudinal and radial expansion of the silicon shockwave as a function of time. (c) Pulse number-dependent longitudinal and radial expansion of silicon shockwaves at a 16 ns probe delay. (d–f) Double logarithmic fitting of the longitudinal and radial expansion for the third, fourth, and fifth pulse ablation.