Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 96, Issue 3, Pages 627-635Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-009-5290-3
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Funding
- Air Force Office of Scientific Research [(Contract F49620-01-1-0429)]
- AppliFlex LLC
- Research Corporation
- National Science Foundation [DMI-0613837, CMMI-0727713]
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [0740683] Funding Source: National Science Foundation
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We investigate the phenomenon of resonant-infrared laser ablation of polymers using polystyrene as a model material. Ablation is carried out using various mid-IR laser wavelengths that are resonant with vibrational modes of a polystyrene target. Time-resolved plume imaging coupled with etch-depth measurements and thermal calculations indicate that ablation begins after a superheated surface layer reaches a temperature of similar to 1000A degrees C and undergoes spinodal decomposition. The majority of the ablated material is then expelled by way of recoil-induced ejection as the pressure of the expanding vapor plume compresses a laser-melted area.
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