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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 13116–13121

Non-thermal ablation of expanded polytetrafluoroethylene with an intense femtosecond-pulse laser

M. Hashida, H. Mishima, S. Tokita, and S. Sakabe  »View Author Affiliations


Optics Express, Vol. 17, Issue 15, pp. 13116-13121 (2009)
http://dx.doi.org/10.1364/OE.17.013116


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Abstract

Ablation of expanded polytetrafluoroethylene without disruption of the fine porous structure is demonstrated using an intense femtosecond-pulse laser. As a result of laser-matter interactions near ablation threshold fluence, high-energy ions are emitted, which cannot be produced by thermal dissociation of the molecules. The ion energy is produced by Coulomb explosion of the elements of (-CF2-CF2-)n, and the energy spectra of the ions show contributions from the Coulomb explosions of the ions rather than those of thermal expansion to generate high-energy ions. The dependence of ion energy on the laser fluence of a 180-fs pulse, compared with that of a 400-ps pulse, also suggests that the high-energy ions are accelerated by Coulomb explosion.

© 2009 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.5470) Materials : Polymers
(240.6670) Optics at surfaces : Surface photochemistry
(020.2649) Atomic and molecular physics : Strong field laser physics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Laser Micromachining

History
Original Manuscript: May 18, 2009
Revised Manuscript: July 9, 2009
Manuscript Accepted: July 10, 2009
Published: July 16, 2009

Citation
M. Hashida, H. Mishima, S. Tokita, and S. Sakabe, "Non-thermal ablation of expanded polytetrafluoroethylene with an intense femtosecond-pulse laser," Opt. Express 17, 13116-13121 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-15-13116


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