Abstract

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.

© 1999 Optical Society of America

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Figures (15)

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