Authors: S Amoruso G Ausanio M Vitiello X Wang
Publish Date: 2005/10/01
Volume: 81, Issue: 5, Pages: 981-986
Abstract
We report infrared ultrashort 780 nm 120 fs laser ablation of graphite in high vacuum The plume characteristics are analyzed by wavelength time and spatially resolved optical emission spectroscopy A multicomponent structure of the plume is observed as a function of time space and laser fluence i line emission from electronically excited carbon neutrals and ions ii luminescence from excited C3 radicals iii broadband visible radiation ascribed to blackbodylike emission from larger carbon clusters The analysis of the graphite plume optical emission indicates the existence of two different ablation regimes with the emission of large graphite fragments at low fluences and carbon radicals and atoms at larger fluences in agreement with the theoretical description of ultrafast ablation of graphite
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