Dynamical response of polarizable nanoparticles to a rotating electric field

Robles, P.; Claro, F.; Rojas, Rodríguez

doi:10.1119/1.3599074

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Forces and Torques On Interacting Particles In An Ac Field1

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Cited by 2 publications

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“…For the special case of a single sphere in a rotating external field the torque is finite, in agreement with Refs. [31] and [32]. The physical origin of such a torque is conservation of angular momentum.…”

Section: Forces and Torques On Interacting Particles In An Ac Fieldmentioning

confidence: 99%

The effect of dissipation on the torque and force experienced by nanoparticles in an AC field

Claro

Fuchs

Robles

et al. 2014

Int. J. Mod. Phys. B

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We discuss the force and torque acting on spherical particles in an ensemble in the presence of a uniform AC electric field. We show that for a torque causing particle rotation to appear the particle must be absorptive. Our proof includes all electromagnetic excitations, which in the case of two or more particles gives rise to one or more resonances in the spectrum of force and torque depending on interparticle distance. Several peaks are found in the force and torque between two spheres at small interparticle distances, which coalesce to just one as the separation grows beyond three particle radii. We also show that in the presence of dissipation the force on each particle is non conservative and may not be derived from the classical interaction potential energy as has been done in the past.

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Section: Forces and Torques On Interacting Particles In An Ac Fieldmentioning

confidence: 99%