Focused electromagnetic doughnut pulses and their interaction with interfaces and nanostructures
Optics
2016-04-20 v1
Abstract
We study the propagation properties and light-matter interactions of the focused doughnut pulses, broadband, single-cycle electromagnetic perturbations of toroidal topology first described by Hellwarth and Nouchi in 1996. We show how focused doughnuts are reflected and refracted at planar metallic and vacuum-dielectric interfaces leading to complex distortions of the field structure. We also identify the conditions under which these toroidal pulses excite dominant dynamic toroidal dipoles in spherical dielectric particles.
Cite
@article{arxiv.1512.04285,
title = {Focused electromagnetic doughnut pulses and their interaction with interfaces and nanostructures},
author = {T. A. Raybould and V. A. Fedotov and N. Papasimakis and I. J. Youngs and N. I. Zheludev},
journal= {arXiv preprint arXiv:1512.04285},
year = {2016}
}
Comments
11 pages, 6 figures