Laser-Induced Hydrodynamic Instability of Fluid Interfaces

Casner, A.; Delville, Jean‐Pierre

doi:10.1103/physrevlett.90.144503

Cited by 72 publications

(29 citation statements)

References 27 publications

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“…When this occurs, there is a dramatic concentration of light energy towards the tip of the bulge which consequently becomes unstable. We have already demonstrated that, under a wide range of scaling conditions, the measured onset power of the instability leading to the liquid jet is in complete accordance with the onset power P S defined by the condition of total reflection [18]:…”

Section: Theoretical Discussionsupporting

confidence: 68%

Asymmetric optical radiation pressure effects on liquid interfaces under intense illumination

2003

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Deformations of horizontal liquid interfaces by optical radiation pressure are generally expected to display similar behaviors whatever the direction of propagation of the exciting laser beam is. In the present experiment we find this expectation to be borne out, as long as the cw laser illumination is moderate in strength. However, as a striking contrast in the case of high field strengths, we find that either a large stable tether can be formed, or else that a break-up of the interface can occur, depending on whether the laser beam is upward or downward directed. Physically, the reason for this asymmetry can be traced to whether total reflection can occur or not. We also present two simple theoretical models, one based on geometrical optics, the other on wave optics, that are able to illustrate the essence of the effect. In the case leading to interface disruption our experimental results are compared with those obtained by Zhang and Chang for water droplets under intense laser pulses [Opt. Lett. 13, 916 (1988)]. A key point in our experimental investigations is to work with a near-critical liquid/liquid interface. The surface tension becomes therefore significantly reduced, which thus enhances the magnitude of the stationary deformations induced.

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Section: Theoretical Discussionsupporting

confidence: 68%

Asymmetric optical radiation pressure effects on liquid interfaces under intense illumination

2003

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“…There is a very strong dependence of the amplitudes on the angle, with the maximum PA wave generated at θ c . According to Minkowski formalism, the angular dependence of the momentum transfer has the form [27] q where θ i and θ r are respectively the incident and the refraction angles versus the interface normal, and R and T are the Fresnel coefficients of reflection and transmission in energy. Figure 3 shows that the Minkowski momentum should attain its maximum at θ c in reasonable agreement with our observations.…”

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confidence: 99%

Photon momentum transfer at water/air interfaces under total internal reflection

et al. 2019

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The transfer of photon momentum at the water/air interface is important for optical manipulation of minute particles and is at the heart of the Minkowski-Abraham controversy. We use photoacoustic (PA) detection of ultrasound waves generated when pulsed laser light meets the water/air interface at 3.9°C (zero thermal expansion), to distinguish momentum transfer from thermoelastic effects. The PA waves dependence on the angle of incidence reveals that momentum transfer maximizes at the critical angle. Momentum transfer is most efficient when the photons travel in water and remain in water after total reflection at the interface, rather than when they cross the interface between dielectric media.

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“…Using the optical radiation pressure of a continuous laser wave to strongly deform transparent liquid interfaces [9], we show that the induced hump becomes unstable for sufficiently large beam intensities, and form a stationary jet that emits droplets [10]. This method presents many advantages.…”

Section: Introductionmentioning

confidence: 98%

Opto-hydrodynamic instability of fluid interfaces

et al. 2005

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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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Laser-Induced Hydrodynamic Instability of Fluid Interfaces

Cited by 72 publications

References 27 publications

Asymmetric optical radiation pressure effects on liquid interfaces under intense illumination

Asymmetric optical radiation pressure effects on liquid interfaces under intense illumination

Photon momentum transfer at water/air interfaces under total internal reflection

Opto-hydrodynamic instability of fluid interfaces

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