24 August 2017 Ultrabroadband polarization-independent absorber based on hyperbolic metamaterial
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Abstract
We present a broadband absorber with the half-cylinder geometry composed of thin film with metallic / dielectric multilayers. The geometric and physical parameters of the proposed structure were optimized to obtain an average absorption above 90% for the modes of electric polarization (TE) and magnetic (TM) in the visible spectrum. High absorption is observed for incident angles of up to 40 degrees in TE mode and 80 degrees for TM mode. The effects of structure periodicity are also investigated for both modes and the results show small changes over a range of 200 nm . In medium IR (infrared) the structure can be scalable to obtain absorption peaks from its geometry.
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I. L. Gomes de Souza, V. F. Rodriguez-Esquerre, "Ultrabroadband polarization-independent absorber based on hyperbolic metamaterial", Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103432M (24 August 2017); doi: 10.1117/12.2273392; https://doi.org/10.1117/12.2273392
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