Volume 119, Number 4, August 2017
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 November 2017|
Egocentric physics: Just about Mie
1 Aix-Marseille Université, CNRS, Ecole Centrale Marseille, Institut Fresnel - 13397 Marseille, France
2 CUDOS, School of Physics, University of Sydney - Sydney, 2006, Australia
Received: 14 July 2017
Accepted: 5 October 2017
We show that the physics of anapole excitations can accurately be described in terms of a truncated resonant state expansion formulation of standard Mie theory as an alternative to the recently advocated “toroidal” current description. In the purely Mie framework, the anapole behavior arises as a result of a Fano-type interference effect between different resonant states with complex wave numbers, provided that non-singular phase factors associated with causality are properly taken into account.
PACS: 42.25.Fx – Diffraction and scattering / 42.50.Md – Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EPLA, 2017
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