Abstract
When the characteristic surface-roughness scale corresponds to the wavelength of the incident radiation, the surface of the target is modulated by a set of nonlinear oscillators (clusters). The dynamic-chaos criterion is calculated near the dissociation limit. It is shown that the value of the external field that controls the dynamic-chaos state is then related to the boundary power density of the laser radiation, which separates the cluster and dropping mechanisms of particle separation from the surface. The numerical estimate obtained for the boundary power density agrees with observations.
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