Analytical achromatic design of metal-dielectric absorbers.
Metal-dielectric coatings can be used successfully to design broadband absorbers. However, the understanding of the designs is not easy. Here we present a new analytical method using achromatic three-layer stacks. Such metal-dielectric basic structures permit movement from a fixed admittance value to another one over a wide spectral range. Efficient designs are calculated and explained with this method.
Lemarquis
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Laboratoire d'Optique des Surfaces et des Couches Minces, Unité Propre de Recherche de l'Enseignement Supérieur Associé au Centre National de la Recherche Scientifique 6080, Ecole Nationale Supérieure de Physique de Marseille, Domaine Universitaire de Saint Jérôme, 13397 Marseille Cedex 20 France.
Marchand
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