Experimental study demonstrates near-unity infrared absorption using patterned metamaterial sublattices, highlighting potential uses in hyperspectral subsampling imaging.
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.
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Liu et al. (2010) studied this question.
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