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Issue 18, 2014
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Laser-induced vibration of a thin soap film

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We report on the vibration of a thin soap film based on the optical radiation pressure force. The modulated low power laser induces a counter gravity flow in a vertical free-standing draining film. The thickness of the soap film is then higher in the upper region than in the lower region of the film. Moreover, the lifetime of the film is dramatically increased by a factor of 2. Since the laser beam only acts mechanically on the film interfaces, such a film can be employed in an optofluidic diaphragm pump, the interfaces behaving like a vibrating membrane and the liquid in-between being the fluid to be pumped. Such a pump could then be used in delicate micro-equipment, in chips where temperature variations are detrimental and even in biological systems.

Graphical abstract: Laser-induced vibration of a thin soap film

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Publication details

The article was received on 28 May 2014, accepted on 30 Jun 2014 and first published on 30 Jun 2014

Article type: Paper
DOI: 10.1039/C4LC00626G
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Lab Chip, 2014,14, 3525-3529

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    Laser-induced vibration of a thin soap film

    O. Emile and J. Emile, Lab Chip, 2014, 14, 3525
    DOI: 10.1039/C4LC00626G

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