Applied Physics A

, Volume 79, Issue 4, pp 717–720

Viscous flow and ablation pressure phenomena in nanosecond UV laser irradiation of polymers

Article

DOI: 10.1007/s00339-004-2693-z

Cite this article as:
Tokarev, V., Lazare, S., Belin, C. et al. Appl. Phys. A (2004) 79: 717. doi:10.1007/s00339-004-2693-z

Abstract

Acceleration and expulsion of a laser-induced melt layer in laser ablation of polymers is studied based on a combination of a quantitative theoretical modeling of ablation pressure and viscous melt flow with an experimental technique of a precise nanoscale measurement of the resulting surface profile. For two particular examples corresponding to so-called ‘stationary’ and ‘non-stationary’ liquid layer flows the following results are obtained: (i) the kinematic viscosity of the laser-induced melt layer on the surface of poly(ethylene terephthalate) at extreme conditions of KrF laser ablation is found for the first time and (ii) a new form of material removal in laser ablation is explained – expulsion of long (up to 1 mm) nanofibers with a radius of about 150–200 nm when a poly(methyl methacrylate) target is irradiated with a single pulse of a KrF excimer laser.

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Laboratoire de Physico-Chimie Moléculaire, CNRS UMR-5803TalenceFrance
  2. 2.Institut d’Electronique Fondamentale (IEF), UMR 8622Université Paris XIOrsayFrance