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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 20, Iss. 1 — Jan. 1, 2003
  • pp: 125–131

Hydrodynamics of particle formation following femtosecond laser ablation

Thornton Ernest Glover  »View Author Affiliations

JOSA B, Vol. 20, Issue 1, pp. 125-131 (2003)

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Ablation driven by intense, femtosecond laser pulses offers a novel route to fabrication of nanometer-sized particles. I model particle formation by considering the hydrodynamics of material expansion into vacuum. Modeling reveals rapid material dilution and cooling. Vacuum expansion is found to quench the ejected material 1–3 orders of magnitude more efficiently than thermal conduction quenches the residual bulk surface. Efficient quenching implies that solid-phase particles are produced rapidly (in ≪1 ns) following laser excitation; this may allow unique material states to be frozen within the ejected particles. Finally, the mean particle size is estimated to range from ∼1 to ∼10 nm for initial lattice temperatures ranging from 0.3 to 10 eV.

© 2003 Optical Society of America

OCIS Codes
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7120) Ultrafast optics : Ultrafast phenomena
(350.3390) Other areas of optics : Laser materials processing

Thornton Ernest Glover, "Hydrodynamics of particle formation following femtosecond laser ablation," J. Opt. Soc. Am. B 20, 125-131 (2003)

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