This video illustrates peculiar phenomena observed during the growth and collapse of a laser-induced cavitation bubble near a tissue mimicking agarose hydrogel. It reveals how the bubble interacts strongly with the hydrogel and takes on a mushroom shape, the cap of which collapses and sets out a spurt of liquid (rainy-jet) with an unprecedented speed of the order of 2000 m/s.
The video also displays the influence of the hydrogel composition on several bubble dynamics key parameters, i.e. bubble volume, collapse time, rebound size, and micro-jet speed.
These results contrast with the case of a cavitation bubble collapsing onto a solid surface, where the dynamics of the bubble result to be much different.
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