Multidiagnostic analysis of ultrafast laser ablation of metals with pulse pair
Citation:
S. Amoruso, R. Bruzzese, X. Wang, G. O Connell, and J. G. Lunney, Multidiagnostic analysis of ultrafast laser ablation of metals with pulse pair, Journal of Applied Physics, 108, 2010, 113302-Download Item:
Multidiagnostic.pdf (Published (publisher's copy) - Peer Reviewed) 1.069Mb
Abstract:
Copper targets are irradiated in the ablation regime by pairs of equal, time-delayed collinear laser
pulses separated on a timescale going from 2 ps to 2 ns. The ablation plume is characterized by
ion probe diagnostic, fast imaging, and temporally and spatially resolved optical emission
spectroscopy. The variation in the ablation efficiency with the delay between the pulses is analyzed
by measuring the ablation crater profile with a contact profilometer. The second laser pulse modifies
the characteristics of the plasma plume produced by the first pulse and the ablation efficiency. The
different mechanisms involved in double pulse ultrafast laser ablation are identified and discussed.
The experimental findings are interpreted in the frame of a simple model of the interaction of the
second pulse with the nascent ablation plume produced by the first pulse. This model yields
consistent and quantitative agreement with the experimental findings predicting the observed
experimental trends of the ablation depth reduction and ion yield increase with the delay between
the pulses, as well as the characteristic timescale of the observed changes. The possibility of
controlling the characteristics of the plumes produced during ultrafast laser ablation via an efficient
coupling of the energy of the second pulse to the various ablation components produced by the first
pulse is of particular interest in ultrafast pulsed laser deposition and microprobe analyses of
materials
Sponsor
Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/jlunneyDescription:
PUBLISHED
Author: LUNNEY, JAMES
Type of material:
Journal ArticleCollections:
Series/Report no:
Journal of Applied Physics108
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Full text availableKeywords:
Fluids and plasma physics, pulsed laser depositionSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1063/1.3516491Licences: