Opto-hydrodynamic instability of fluid interfaces

Jean-Pierre Delville; Bruno Issenmann; Regis Wunenburger; Alexis Casner

doi:10.1117/12.613413

26 August 2005 Opto-hydrodynamic instability of fluid interfaces

Jean-Pierre Delville, Bruno Issenmann, Regis Wunenburger, Alexis Casner

Proceedings Volume 5930, Optical Trapping and Optical Micromanipulation II; 59300P (2005) https://doi.org/10.1117/12.613413
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The bending of fluid interfaces by the optical radiation pressure is now recognized as an appealing contactless tool to probe microscopic surface properties of soft materials. However, as the radiation pressure is intrinsically weak (typically of the order of a few Pascal), investigations are often limited to the regime of weak deformations. Non-linear behaviors can nevertheless be investigated using very soft fluid interfaces. Either a large stable tether is formed, or else a break-up of the interface occurs above a well-defined beam power threshold, depending on the direction of the beam propagation. This asymmetry originates from the occurrence of total reflection condition of light at deformed interface. Interface instability results in the formation of a stationary beam-centered liquid micro-jet that emits droplets. Radiation-induced jetting can also lead to giant tunable liquid columns with aspect ratio up to 100, i.e. well beyond the fundamental Rayleigh-Plateau limitation. Consequently, the applications range of the opto-hydrodynamic interface instability is wide, going from adaptative micro-optics (lensing and light guiding by the induced columns) to micro-fluidics and microspraying, as fluid transfer is optically monitored and directed in three dimensions.

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Jean-Pierre Delville, Bruno Issenmann, Regis Wunenburger, and Alexis Casner "Opto-hydrodynamic instability of fluid interfaces", Proc. SPIE 5930, Optical Trapping and Optical Micromanipulation II, 59300P (26 August 2005); https://doi.org/10.1117/12.613413

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KEYWORDS

Interfaces

Liquids

Microfluidics

Beam propagation method

Refractive index

Adaptive optics

Optical fibers

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