Investigation of femtosecond laser induced thermal ablation of polyethylene

Andrew J. Lee*, Judith M. Dawes, Michael J. Withford

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We present a novel method for profiling high aspect ratio and undercut laser drilled holes using sacrificial layers. This profiling method is used to compare and contrast laser ablation of polyethylene films under exposure to ultraviolet (266nm) and near-infrared (800nm) radiation from an ultrafast, femtosecond laser. We find that ultraviolet femtosecond pulsed laser processing of this polymer exhibits similar characteristics to that reported for nanosecond pulsed excimer lasers; namely, that thermal ablation contributes to material removal at high fluences. In addition, the total volume of material removed via IR femtosecond laser ablation is shown to be up to 4 times that for UV femtosecond laser ablation at a similar fluence and low pulse repetition frequency.

Original languageEnglish
Pages (from-to)154-159
Number of pages6
JournalJournal of Laser Applications
Volume20
Issue number3
DOIs
Publication statusPublished - 2008

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