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Proceedings Paper

Detection of Si-nanoclusters produced by laser ablation: delay time in photoluminescence and Rayleigh scattering
Author(s): Boris S. Luk'yanchuk; Vladimir I. Marine
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Paper Abstract

There are number of methods to detect formation of nanoclusters produced by ns-laser ablation, during the expansion of vapor: optical time of flight (TOF), photoluminescence, Rayleigh scattering, etc. For typical conditions of expansion into the vacuum, formation of nanoclusters is completed at the moment of quenching (when the collisions are terminated) which occur after a few microsecond(s) . During the expansion of vapor into the background gas, the condensation process is terminated due to mixing of vapor with background gas. The characteristic mixing time can be estimate from the characteristic increment of the Rayleigh-Taylor instability; this time is around a few microsecond(s) for typical pressures of background gas. Fast formation of overcritical clusters is confirmed by TOF experiments.

Paper Details

Date Published: 1 February 2000
PDF: 11 pages
Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); doi: 10.1117/12.376964
Show Author Affiliations
Boris S. Luk'yanchuk, General Physics Institute (Russia)
Vladimir I. Marine, Univ. de la Mediteranee--Aix-Marseille II (France)


Published in SPIE Proceedings Vol. 3885:
High-Power Laser Ablation II
Claude R. Phipps; Masayuki Niino, Editor(s)

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