Abstract
Nonresonant anisotropic metamaterials (AMMs), such as nanotube arrays, can be applied to achieve broadband absorption of electromagnetic (EM) waves. However, the AMMs should be very thick ( wavelengths) to attain high absorption. Here, we propose that using a slanted or corrugated metallic mirror, a thin AMM ( wavelengths) is sufficient to obtain high absorption in a wide wavelength range (absorption for wavelengths of ) and over a wide angular range. Unlike common absorptions, EM waves in an ambient medium (air) is first coupled with a propagating wave in the AMM and is then converted into a lossy wave by mirror reflections.
- Received 18 April 2009
DOI:https://doi.org/10.1103/PhysRevB.80.125103
©2009 American Physical Society