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01-01-2015 | Issue 1/2015 Open Access

Optical and Quantum Electronics 1/2015

Multilayer metamaterial absorbers inspired by perfectly matched layers

Journal:
Optical and Quantum Electronics > Issue 1/2015
Authors:
Anna Pastuszczak, Marcin Stolarek, Tomasz J. Antosiewicz, Rafał Kotyński
Important notes
This work was supported by research project UMO-2011/01/B/ST3/02281 of the Polish National Science Center. PL-Grid infrastructure is acknowledged for providing access to computational resources.

Abstract

We derive periodic multilayer absorbers with effective uniaxial properties similar to perfectly matched layers (PML). This approximate representation of PML is based on the effective medium theory and we call it an effective medium PML. We compare the spatial reflection spectrum of the layered absorbers to that of a PML material and demonstrate that after neglecting gain and magnetic properties, the absorber remains functional. This opens a route to create electromagnetic absorbers for real and not only numerical applications and as an example we introduce a layered absorber for the wavelength of 8 \(\upmu \hbox {m}\) made of \(\hbox {SiO}_2\) and NaCl. We also show that similar cylindrical core-shell nanostructures derived from flat multilayers also exhibit very good absorptive and reflective properties despite the different geometry.

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