Negative Refractive Index at Optical Wavelengths

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Science  05 Jan 2007:
Vol. 315, Issue 5808, pp. 47-49
DOI: 10.1126/science.1136481

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Metamaterials are designed to have structures that provide optical properties not found in nature. If their capacity can be extended, new kinds of devices for imaging and control of light will be possible.

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