Cavitation dynamics and directional microbubble ejection induced by intense femtosecond laser pulses in liquids

We study cavitation dynamics when focusing ring-shaped femtosecond laser beams in water. This focusing geometry reduces detrimental nonlinear beam distortions and enhances energy deposition within the medium, localized at the focal spot. We observe remarkable postcollapse dynamics of elongated cavit...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2012-09, Vol.86 (3 Pt 2), p.036304-036304, Article 036304
Main Authors: Faccio, D, Tamošauskas, G, Rubino, E, Darginavičius, J, Papazoglou, D G, Tzortzakis, S, Couairon, A, Dubietis, A
Format: Article
Language:English
Subjects:
Computer Simulation
Gases - chemistry
Gases - radiation effects
Lasers
Microbubbles
Models, Chemical
Rheology - methods
Solutions - chemistry
Solutions - radiation effects
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Summary:We study cavitation dynamics when focusing ring-shaped femtosecond laser beams in water. This focusing geometry reduces detrimental nonlinear beam distortions and enhances energy deposition within the medium, localized at the focal spot. We observe remarkable postcollapse dynamics of elongated cavitation bubbles with high-speed ejection of microbubbles out of the laser focal region. Bubbles are ejected along the laser axis in both directions (away and towards the laser). The initial shape of the cavitation bubble is also seen to either enhance or completely suppress jet formation during collapse. In the absence of jetting, microbubble ejection occurs orthogonal to the laser propagation axis.
ISSN:1539-3755
1550-2376
DOI:10.1103/physreve.86.036304