This animation shows the dynamics of a material ejection in the regime of thermal confinement at laser fluence close to the threshold for the onset of ablation. A detailed discussion of the physical mechanisms leading to the material ejection and the parameters of the ejection process is given in [ L. V. Zhigilei and B. J. Garrison, Microscopic Mechanisms of Laser Ablation of Organic Solids in the Thermal and Stress Confinement Irradiation Regimes, J. Appl. Phys. 88, 1281-1298 (2000), Abstract, Full Text: PDF (800 kB) ].
To see animated snapshots from a simulation with the same pulse duration but at higher laser fluence click here.
To see animated snapshots from a simulation at laser fluence close to the threshold for the onset of ablation with ten times shorter laser pulse, in the regime of stress confinement, click here.