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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 12 — Dec. 1, 2013
  • pp: 3233–3242

Phase modulation and morphological evolution associated with surface-bound particle ablation

Manyalibo J. Matthews, Nan Shen, John Honig, Jeff D. Bude, and Alexander M. Rubenchik  »View Author Affiliations


JOSA B, Vol. 30, Issue 12, pp. 3233-3242 (2013)
http://dx.doi.org/10.1364/JOSAB.30.003233


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Abstract

Surface modification of fused silica windows caused by the ablation of surface-bound microparticles under short pulse laser irradiation is investigated and related to beam propagation effects. Particle material dispersal and subsequent surface pitting after multiple pulses of 351 nm, 9J/cm2 laser light were found to depend strongly on material type and particle size. Surface pitting was most significant for opaque materials (aluminum, steel, acetal homopolymer), yielding pits as deep as 600 nm for 30μm diameter particles. Transparent particles (PET polymer, glass) tended to disperse material more widely and caused less pitting (100nm) than the opaque materials. Paraxial light propagation analysis showed that phase objects created by ablated opaque materials resulted in higher peak intensification (3x) than those created by transparent materials (1.5x). The fragmentation of ablated material is discussed in terms of brittle or ductile failure at high strain rates, indicating reasonable agreement between experiment and theory. An approximation for the laser-induced plasma pressure and size of the dispersal pattern is derived, indicating an inverse correlation with material density.

OCIS Codes
(070.4690) Fourier optics and signal processing : Morphological transformations
(140.3330) Lasers and laser optics : Laser damage
(320.4240) Ultrafast optics : Nanosecond phenomena

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: August 19, 2013
Revised Manuscript: October 11, 2013
Manuscript Accepted: October 11, 2013
Published: November 19, 2013

Citation
Manyalibo J. Matthews, Nan Shen, John Honig, Jeff D. Bude, and Alexander M. Rubenchik, "Phase modulation and morphological evolution associated with surface-bound particle ablation," J. Opt. Soc. Am. B 30, 3233-3242 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-12-3233

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