Ultra-broadband, polarization-independent, wide-angle absorption in impedance-matched metamaterials with anti-reflective moth-eye surfaces
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Date
2018
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Citation of Original Publication
Contractor, Rushin; D’Aguanno, Giuseppe; Menyuk, Curtis; Ultra-broadband, polarization-independent, wide-angle absorption in impedance-matched metamaterials with anti-reflective moth-eye surfaces; Optics Express Vol. 26, Issue 18, pp. 24031-24043 (2018); https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-18-24031
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©2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved–the terms of their open access agreement apply to all OSA formatted accepted versions of journal articles.
©2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved–the terms of their open access agreement apply to all OSA formatted accepted versions of journal articles.
Subjects
Abstract
We computationally study periodic impedance-matched metal-dielectric metamaterials and the advantage of imprinting moth-eye surfaces on them. Impedance-matched metamaterials are known to act as strong, polarization-independent, broadband absorbers. However, in the infrared region far from the metal’s plasma frequency, the reflection from metal layers dominates over the absorption. Using anti-reflective moth-eye surfaces we show that it is possible to obtain absorption independent of polarization or incidence angle, over an exceptionally broad frequency range from 400 nm to 6 µm.