Phys.org  February 15, 2019
Researchers at Duke University constructed zirconia ceramic surface dimpled with cylinders like the face of a Lego brick. After computationally modeling the device’s properties by altering the cylinders’ size and spacing, the researchers realized that they had actually created a more fundamental kind of coherent perfect absorber (CPA) which can absorb both aligned and misaligned waves. Unlike typical CPAs the new material has three variables the cylinders’ radius, height and periodicity. This gives a lot of flexibility for tailoring the CPA model and put them in the frequency spectrum where needed…read more. TECHNICAL ARTICLEÂ
The width, height and spacing of the cylinders depicted here dictates how the metamaterial described in the new paper absorbs electromagnetic energy. Credit: Kebin Fan, Duke University