Electromagnetic analysis of cylindrical invisibility cloaks and the mirage effect.
We present a finite-element analysis of a diffraction problem involving a coated cylinder enabling the electromagnetic cloaking of a lossy object with sharp wedges located within its core. The coating consists of a heterogeneous anisotropic material deduced from a geometrical transformation as first proposed by Pendry [Science 312, 1780 (2006)]. We analyze the electromagnetic response of the cloak in the presence of an electric line source in p polarization and a loop of magnetic current in s polarization. We find that the electromagnetic field radiated by such a source located a fraction of a wavelength from the cloak is perturbed by less than 1%. When the source lies in the coating, it seems to radiate from a shifted location.
Zolla
Frédéric
F
Institut Fresnel, UMR CNRS 6133, University Aix-Marseille, France.
Guenneau
Sébastien
S
Nicolet
André
A
Pendry
J B
JB