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Acoustic Radiation Force and Torque on Small Particles as Measures of the Canonical Momentum and Spin Densities

Toftul, I. D.; Bliokh, Konstantin; Petrov, Mihail I; Nori, Franco


We examine acoustic radiation force and torque on a small (subwavelength) absorbing isotropic particle immersed in a monochromatic (but generally inhomogeneous) sound-wave field. We show that by introducing the monopole and dipole polarizabilities of the particle, the problem can be treated in a way similar to the well-studied optical forces and torques on dipole Rayleigh particles. We derive simple analytical expressions for the acoustic force (including both the gradient and scattering...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.123.183901
Access Rights: Open Access


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