  Most of the vibrating mechanisms of optofluidicsystems are based on local
heating of membranes that in-duces liquid flow. We report here a new type of
diaphragmpump in a liquid film based on the optical radiation pres-sure force.
We modulate a low power laser that gener-ates, at resonance, a symmetric
vibration of a free standingsoap film. The film lifetime strongly varies from
56 s at lowpower (2 mW) to 2 s at higher power (70 mW). Since thelaser beam
only acts mechanically on the interfaces, sucha pump could be easily
implemented on delicate micro-equipment on chips or in biological systems.
