Abstract.
Micro-bubbles have been stably trapped in liquid ethanol by a focused argon laser beam. Two equilibrium points where bubbles can be trapped are observed to be at the center and the rim of the laser beam. The light force is also able to push a bubble into the liquid to a position well below the liquid surface. Both the light-pressure force and the fluid force induced by the convection of the liquid medium are calculated. The results clearly show that these two kinds of forces account for the formation of trapping potential.
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Received: 3 February 2000 / Revised version: 6 July 2000 / Published online: 8 November 2000
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Lü, B., Li, Y., Ni, H. et al. Laser-induced hybrid trap for micro-bubbles . Appl Phys B 71, 801–805 (2000). https://doi.org/10.1007/s003400000424
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DOI: https://doi.org/10.1007/s003400000424