Plume splitting in pico-second laser–material interaction under the influence of shock wave

Laser-Induced Breakdown Spectroscopy

“…Gacek et al 41 presented simulations on the fundamentals of plume splitting at atomistic level under the influence of shock wave during the early stage of its propagation (up to 2 ns). According to their findings, at the very beginning of ablation, two distinguishable density peaks at the plume emerge and quickly disappear due to the spread-out of the slower moving part.…”

Material behavior under extreme domain constraint in laser-assisted surface nanostructuring

“…Argon crystal is arranged in the simple face-centered cubic structure and well described by the Lennard-Jones (12-6) potential.It is easy for the modeling and fast for the computation while the conclusion does not lose its generality. A lot of works in our group [35][36][37][38] [43,44] have proved its validity in laser-material interaction simulation.The LJ potential well depth ɛ is 0.0103 ev and the equilibrium separation parameter σ is 3.406 Å. And the cut-off distance is set to 2.5σ.…”

Scanning Strategies in Laser Surface Texturing: A Review

“…In the latter time, the shock wave slows down to the speed of sound and travels forward as a sound wave [ 56 ]. The formation of this shock wave expanding starts in a short time period ( ns), when the mass of the shock wave becomes comparable with the plume mass [ 57 , 58 ]. The following movement of the plasma plume in ambient gas can be described by the drag model [ 35 , 56 , 59 ]: where is the position of the plasma plume front during expansion, is the stopping distance of the plume, and is the deceleration coefficient.…”