6 May 2015 Perfectly matched layer based multilayer absorbers
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Broadband layered absorbers are analysed theoretically and experimentally. A genetic algorithm is used to opti- mize broadband and wide-angle of incidence metal-dielectric layered absorbers. An approximate representation of the perfectly matched layer with a spatially varied absorption strength is discussed. The PML is realised as a stack of uniform and isotropic metamaterial layers with permittivieties and permeabilities given from the effective medium theory. This approximate representation of PML is based on the effective medium theory and we call it an effective medium PML (EM-PML).1 We compare the re ection properties of the layered absorbers to that of a PML material and demonstrate that after neglecting gain and magnetic properties, the absorber remains functional.
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Tomasz Stefaniuk, Tomasz Stefaniuk, Marcin Stolarek, Marcin Stolarek, Anna Pastuszczak, Anna Pastuszczak, Piotr Wróbel, Piotr Wróbel, Bartosz Wieciech, Bartosz Wieciech, Tomasz J. Antosiewicz, Tomasz J. Antosiewicz, Rafał Kotyński, Rafał Kotyński, } "Perfectly matched layer based multilayer absorbers", Proc. SPIE 9502, Metamaterials X, 95020F (6 May 2015); doi: 10.1117/12.2181875; https://doi.org/10.1117/12.2181875

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