Excimer laser ablation of molten metals as followed by ultrafast photography

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Molten Sn and Bi are ablated in vacuum by an ArF excimer laser. Pictures of the surface and the ablated material are taken by ultrafast photography, with temporal resolution of 1 ns using delayed dye laser pulses. The series of snapshots covering the 0 ns-200 μs time domain contain information on the ablated plume, the development of waves on the target surface, and the initial phase of droplet formation. The velocity of the front of the ablated plume is approximately 6 km/s for both Sn and Bi at 5.5 J/cm2. While on the molten Sn surface only wave generation is observed with practically no droplet emission, the Bi surface emits a remarkable amount of material in the form of droplets originating from liquid jets. The speed of these droplets is two orders of magnitude smaller than that of the plume front. The relaxation of the whole perturbed melt pool lasts second(s) after ablation. By decreasing the fluence below 2.5 J/cm2 the Bi droplet formation can also be suppressed.

Original languageEnglish
Pages (from-to)130-134
Number of pages5
JournalApplied Surface Science
Volume138-139
Issue number1-4
Publication statusPublished - Jan 1999

Fingerprint

photography
Photography
Excimer lasers
Laser ablation
Liquid metals
excimer lasers
laser ablation
plumes
metals
Molten materials
wave generation
temporal resolution
dye lasers
Dye lasers
ablation
fluence
Ablation
coverings
Laser pulses
vacuum

Keywords

  • Laser beam applications
  • Pulsed laser deposition, PLD
  • Thin film deposition

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Excimer laser ablation of molten metals as followed by ultrafast photography. / Tóth, Z.; Hopp, B.; Smausz, T.; Kántor, Zoltán; Ignácz, F.; Szörényi, T.; Bor, Z.

In: Applied Surface Science, Vol. 138-139, No. 1-4, 01.1999, p. 130-134.

Research output: Contribution to journalArticle

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AU - Ignácz, F.

AU - Szörényi, T.

AU - Bor, Z.

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