Conventional metamaterials that show negative refraction suffer from high intrinsic losses and are difficult to fabricate. A novel anisotropic semiconducting metamaterial offers a solution.
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Padilla, W. A new class of metamaterials. Nature Mater 6, 922–923 (2007). https://doi.org/10.1038/nmat2065
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DOI: https://doi.org/10.1038/nmat2065
