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Updated: Mar 26, 2026

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
Published on: June 14, 2019
Quantitative assessment of radiation force effect at the dielectric air-liquid interface
Otávio Augusto Capeloto1, Vitor Santaella Zanuto1, Luis Carlos Malacarne1
1Universidade Estadual de Maringá, Departamento de Física, Maringá, PR 87020-900, Brazil.
Abstract:
We induce nanometer-scale surface deformation by exploiting momentum conservation of the interaction between laser light and dielectric liquids. The effect of radiation force at the air-liquid interface is quantitatively assessed for fluids with different density, viscosity and surface tension. The imparted pressure on the liquids by continuous or pulsed laser light excitation is fully described by the Helmholtz electromagnetic force density.
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