Detection of Si-nanoclusters produced by laser ablation: delay time in photoluminescence and Rayleigh scattering

Boris S. Luk'yanchuk; Vladimir I. Marine

doi:10.1117/12.376964

1 February 2000 Detection of Si-nanoclusters produced by laser ablation: delay time in photoluminescence and Rayleigh scattering

Boris S. Luk'yanchuk, Vladimir I. Marine

Author Affiliations +

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376964
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

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.

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Boris S. Luk'yanchuk and Vladimir I. Marine "Detection of Si-nanoclusters produced by laser ablation: delay time in photoluminescence and Rayleigh scattering", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376964

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