Magnetic levitation of metamaterial bodies enhanced with magnetostatic surface resonances

Yaroslav Urzhumov, Wenchen Chen, Chris Bingham, Willie Padilla, and David R. Smith
Phys. Rev. B 85, 054430 – Published 27 February 2012

Abstract

We propose that macroscopic objects built from negative-permeability metamaterials may experience resonantly enhanced magnetic force in low-frequency magnetic fields. Resonant enhancement of the time-averaged force originates from magnetostatic surface resonances (MSRs), which are analogous to the electrostatic resonances of negative-permittivity particles, well known as surface plasmon resonances in optics. We generalize the classical problem of the MSR of a homogeneous object to include anisotropic metamaterials and consider the most extreme case of anisotropy, where the permeability is negative in one direction but positive in the others. It is shown that deeply subwavelength objects made of such indefinite (hyperbolic) media exhibit a pronounced magnetic dipole resonance that couples strongly to uniform or weakly inhomogeneous magnetic field and provides strong enhancement of the magnetic force, enabling applications such as enhanced magnetic levitation.

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  • Received 1 November 2011

DOI:https://doi.org/10.1103/PhysRevB.85.054430

©2012 American Physical Society

Authors & Affiliations

Yaroslav Urzhumov1,*, Wenchen Chen2, Chris Bingham2, Willie Padilla2, and David R. Smith1

  • 1Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina, 27708 USA
  • 2Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 USA

  • *yaroslav.urzhumov@duke.edu

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Vol. 85, Iss. 5 — 1 February 2012

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