Plasma and cavitation dynamics during pulsed laser microsurgery in vivo

Details Plasma and cavitation dynamics during pulsed laser microsurgery in vivo Plasma and cavitation dynamics during pulsed laser microsurgery in vivo

2007-05-21

arxiv.org/abs/0705.3022v1

Phys. Rev. Lett. 99, 158104 (2007)

Physics

Biological Physics

9 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.99.158104

We compare the plasma and cavitation dynamics underlying pulsed laser microsurgery in water and in fruit fly embryos (in vivo) - specifically for nanosecond pulses at 355 and 532 nm. We find two key differences. First, the plasma-formation thresholds are lower in vivo - especially at 355 nm - due to the presence of endogenous chromophores that serve as additional sources for plasma seed electrons. Second, the biological matrix constrains the growth of laser-induced cavitation bubbles. Both effects reduce the disrupted region in vivo when compared to extrapolations from measurements in water.

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