TY - JOUR
T1 - Theory for the ultrafast ablation of graphite films
AU - Jeschke, Harald Olaf
AU - Garcia, Martin E.
AU - Bennemann, K. H.
PY - 2001
Y1 - 2001
N2 - The physical mechanisms for damage formation in graphite films induced by femtosecond laser pulses are analyzed using a microscopic electronic theory. We describe the nonequilibrium dynamics of electrons and lattice by performing molecular dynamics simulations on time-dependent potential energy surfaces. We show that graphite has the unique property of exhibiting two distinct laser-induced structural instabilities. For high absorbed energies (>3.3eV/atom) we find nonequilibrium melting followed by fast evaporation. For low intensities above the damage threshold (>2.0eV/atom) ablation occurs via removal of intact graphite sheets.
AB - The physical mechanisms for damage formation in graphite films induced by femtosecond laser pulses are analyzed using a microscopic electronic theory. We describe the nonequilibrium dynamics of electrons and lattice by performing molecular dynamics simulations on time-dependent potential energy surfaces. We show that graphite has the unique property of exhibiting two distinct laser-induced structural instabilities. For high absorbed energies (>3.3eV/atom) we find nonequilibrium melting followed by fast evaporation. For low intensities above the damage threshold (>2.0eV/atom) ablation occurs via removal of intact graphite sheets.
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U2 - 10.1103/PhysRevLett.87.015003
DO - 10.1103/PhysRevLett.87.015003
M3 - Article
AN - SCOPUS:85035283580
VL - 87
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 1
ER -