Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves
Optics
2012-03-28 v1
Abstract
We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed of only isotropic media; it operates in the transmission mode and requires no mirror or ground plane. Unlike the well-known omnidirectional spherical cloaks, it may reduce visibility of an arbitrary object only for a very limited range of observation angles. In the short-wavelength limit, this cloaking structure restores not only the trajectories of incident rays, but also their phase, which is a necessary ingredient to complete invisibility. Both scalar-wave (acoustic) and transverse vector-wave (electromagnetic) versions are presented.
Cite
@article{arxiv.1203.5831,
title = {Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves},
author = {Yaroslav Urzhumov and Nathan Landy and David R. Smith},
journal= {arXiv preprint arXiv:1203.5831},
year = {2012}
}
Comments
17 pages, 12 figures