On the physical mechanisms of liquid-assisted laser cleaning

This communication addresses two questions regarding the physical mechanisms of the liquid-assisted laser cleaning: (1) What is the correlation between the cleaning force and bubble dynamics in the explosive vaporization of the liquid film? (2) How does the liquid-film thickness affect the cleaning...

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Bibliographic Details
Published in:Journal of applied physics 2003-01, Vol.93 (1), p.762-764
Main Authors: Kim, Dongsik, Lee, Joochul
Format: Article
Language:English
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Summary:This communication addresses two questions regarding the physical mechanisms of the liquid-assisted laser cleaning: (1) What is the correlation between the cleaning force and bubble dynamics in the explosive vaporization of the liquid film? (2) How does the liquid-film thickness affect the cleaning process? Transient displacement of the cleaning target is measured by optical interferometry for in situ detection of the cleaning force. Time-resolved visualization and optical reflectance probing are conducted for monitoring the behavior of the liquid film in the cleaning process, with emphasis on the effect of liquid-film thickness. The results prove that cleaning force is generated when the bubble nuclei initially grow in the strongly superheated liquid. The liquid-film thickness is shown to be irrelevant to the origin of the force though it affects the dynamics of liquid plume and possibly changes the cleaning efficiency.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1527207