Transformation Optics, Generalized Cloaking and Superlenses

In this paper, transformation optics is presented together with a generalization of invisibility cloaking: instead of an empty region of space, an inhomogeneous structure is transformed via Pendry's map in order to give, to any object hidden in the central hole of the cloak, a completely arbitrary appearance. Other illusion devices based on superlenses considered from the point of view of transformation optics are also discussed.Comment: 7 pages (two columns), 9 figures, to appear in IEEE Trans. Mag., invited paper in Compumag 2009 (Florianopolis, Brasil), corresponding slides available on http://www.fresnel.fr/perso/nicolet

A versatile full-vectorial finite element model for crossed-gratings

International audienc

All-purpose finite element formulation for arbitrarily shaped crossed-gratings embedded in a multilayered stack

International audienc

An all-purpose three-dimensional finite element model for crossed-gratings

International audienc

Electrostatic resonances in sign shifting materials

On montre l'existence de résonances électrostatiques dans le comportement basse fréquence de réseaux bidimensionnels métalliques