Femtosecond laser ablation of copper at high laser fluence: Modeling and experimental comparison

Thermal and non-thermal explosion in metals ablation by femtosecond laser pulse: classical approach of the Two Temperature Model

“…Even if all authors are in agreement with the fact that the matter ejected in liquid form is necessarily due to phase explosion whether by nanosecond pulse [1,4] or at high fluence by femtosecond pulse [3,5], we must investigate the physical mecanism responsible of the metal ablation by femtosecond (fs) laser pulse at low and high fluence.…”

“…thermal explosion basing on the existing quantum Two Temperature Model (TTMq) [5,7,8]. But the problem is that this model does not give any information on the ablation state at low fluence (aroud ablation thershold), also the phase explosion model does not explane the absense of liquid around the crater at low fluence.…”

Drilling of Copper Using a Dual-Pulse Femtosecond Laser

“…In this study, polynomial functions are used to describe the C e and G for the copper material over a range of electron temperatures [14,25]. At a non-equilibrium condition, the k e used is a function of electron and lattice temperature as [24]:…”

“…For example, the ablation rate of iron can be optimized by variation of the single pulse duration in the range of 0.3-3.6 ps [12]. In our previous study, both numerical simulation and experiments was performed to investigate the femtosecond laser ablation of copper by a single-shot or multi-pulses [13,14].…”

Influence of distance between sample surface and focal point on spectral intensity of nanosecond laser-induced silicon plasma in air

“…The results show that the position of the focal point plays a very important role in LIBS technology. [27][28][29] In addition, with the decrease of laser spot size, taking the example of Fig. 4 (b), we can divide the left side (-20 mm -0 mm) into three regions (-20 mm --10 mm, -10 mm --5 mm and -5 mm -0 mm).…”