How black is black? An ideally black material would absorb light perfectly at all angles for all wavelengths. Using arrays of carbon nanotubes, researchers based in New York have now engineered a metamaterial that constitutes the darkest material ever made.
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Garcia-Vidal, F. Towards the dark side. Nature Photon 2, 215–216 (2008). https://doi.org/10.1038/nphoton.2008.45
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DOI: https://doi.org/10.1038/nphoton.2008.45
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