Integrated continuum-atomistic modeling of nonthermal ablation of gold nanofilms by femtosecond lasers

Yong Gan; Chen, J. K.
May 2009
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p201116
Academic Journal
Ultrafast nonthermal ablation of gold nanofilms is studied using a combined two-temperature model and molecular dynamics method. The results show that for thinner films the tensile stress is directly reversed from the initially generated compressive stress. For thicker films, on the other hand, the tensile stress wave is reflected from the irradiated surface. The key driving force for ultrafast nonthermal material ablation is conventional thermal stress, instead of the hot electron blast force.


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