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Proceedings Paper

On the mechanism of resonant infrared polymer ablation: the case of polystyrene
Author(s): S. L. Johnson; D. M. Bubb; K. E. Schriver; R. F. Haglund
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Paper Abstract

We investigate the fundamental mechanisms of resonant-infrared laser ablation of polymers using polystyrene as a model material. Time-resolved plume shadowgraphy coupled with laser-induced temperature-rise calculations indicate that spinodal decomposition of a superheated surface layer is the primary mechanism for the initial stages of material removal. The majority of the ablated material is then released by way of recoil-induced ejection of liquid which proceeds for some tens of microseconds following a ~μs laser pulse excitation. The recoil-induced ejection of liquid material as the dominant ablation mechanism helps to explain previous observations of laser deposition of intact polymeric material.

Paper Details

Date Published: 14 May 2008
PDF: 10 pages
Proc. SPIE 7005, High-Power Laser Ablation VII, 70050G (14 May 2008); doi: 10.1117/12.786387
Show Author Affiliations
S. L. Johnson, Vanderbilt Univ. (United States)
D. M. Bubb, Rutgers Univ. (United States)
K. E. Schriver, Vanderbilt Univ. (United States)
R. F. Haglund, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 7005:
High-Power Laser Ablation VII
Claude R. Phipps, Editor(s)

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