Infrared Spatial and Frequency Selective Metamaterial with Near-Unity Absorbance

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Abstract
We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime. We achieve an experimental absorption of 97% at a wavelength of 6.0   μm, and our results agree well with numerical full-wave simulations. By using two different metamaterial sublattices we experimentally demonstrate a spatial and frequency varying absorption which may have many relevant applications, including hyperspectral subsampling imaging. DOI: http://dx.doi.org/10.1103/PhysRevLett.104.207403 © 2010 The American Physical Society