On the mechanism of resonant infrared polymer ablation: the case of polystyrene

S. L. Johnson; D. M. Bubb; K. E. Schriver; R. F. Haglund Jr.

doi:10.1117/12.786387

14 May 2008 On the mechanism of resonant infrared polymer ablation: the case of polystyrene

S. L. Johnson, D. M. Bubb, K. E. Schriver, R. F. Haglund Jr.

Proceedings Volume 7005, High-Power Laser Ablation VII; 70050G (2008) https://doi.org/10.1117/12.786387
Event: High-Power Laser Ablation 2008, 2008, Taos, New Mexico, United States

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.

Citation Download Citation

S. L. Johnson, D. M. Bubb, K. E. Schriver, and R. F. Haglund Jr. "On the mechanism of resonant infrared polymer ablation: the case of polystyrene", Proc. SPIE 7005, High-Power Laser Ablation VII, 70050G (14 May 2008); https://doi.org/10.1117/12.786387

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