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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

Description

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]

dc.contributor.authorToftul, I. D.
dc.contributor.authorBliokh, Konstantin
dc.contributor.authorPetrov, Mihail I
dc.contributor.authorNori, Franco
dc.date.accessioned2020-07-01T00:36:35Z
dc.date.available2020-07-01T00:36:35Z
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/1885/205689
dc.description.abstractWe 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 forces) and torque. Importantly, these expressions reveal intimate relations to the fundamental field properties introduced recently for acoustic fields: the canonical momentum and spin angular momentum densities. We compare our analytical results with previous calculations and exact numerical simulations. We also consider an important example of a particle in an evanescent acoustic wave, which exhibits the mutually orthogonal scattering (radiation-pressure) force, gradient force, and torque from the transverse spin of the field.
dc.description.sponsorshipThis work was partially supported by MURI Center for Dynamic Magneto-Optics via the Air Force Office of Scientific Research (AFOSR) (FA9550-14-1-0040), Army Research Office (ARO) (Grant No. W911NF-18-1-0358), Asian Office of Aerospace Research and Development (AOARD) (Grant No. FA2386-18-1-4045), Japan Science and Technology Agency (JST) (Q-LEAP program, and CREST Grant No. JPMJCR1676), Japan Society for the Promotion of Science (JSPS) (JSPS-RFBR Grant No. 17-52-50023 and JSPS-FWO Grant No. VS.059.18N), RIKEN-AIST Challenge Research Fund, the John Templeton Foundation, Russian Foundation for Basic Research (Project No. 19-32-90237), the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS,” and the Australian Research Council (FT140101126).
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.rights© 2019 American Physical Society
dc.sourcePhysical Review Letters
dc.titleAcoustic Radiation Force and Torque on Small Particles as Measures of the Canonical Momentum and Spin Densities
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume123
dc.date.issued2019
local.identifier.absfor020503 - Nonlinear Optics and Spectroscopy
local.identifier.ariespublicationu3102795xPUB5471
local.publisher.urlhttps://www.aps.org/
local.type.statusPublished Version
local.contributor.affiliationToftul, I. D., RIKEN Cluster for Pioneering Research
local.contributor.affiliationBliokh, Konstantin, College of Science, ANU
local.contributor.affiliationPetrov, Mihail I, ITMO University
local.contributor.affiliationNori, Franco, University of Michigan
dc.relationhttp://purl.org/au-research/grants/arc/FT140101126
local.bibliographicCitation.issue18
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage7
local.identifier.doi10.1103/PhysRevLett.123.183901
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2020-01-27T16:10:30Z
local.identifier.scopusID2-s2.0-85074879308
dcterms.accessRightsOpen Access
dc.provenancehttp://sherpa.ac.uk/romeo/issn/0031-9007/..."author can archive publisher's version/PDF" from SHERPA/RoMEO site (as at 01/07/2020).
CollectionsANU Research Publications

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