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Negative refraction goes optical Physicists in the US have demonstrated negative refraction at optical wavelengths for the first time. Vladimir Shalaev and colleagues at Purdue University obtained the result in a material consisting of an array of pairs of parallel gold nanorods (arXiv.org/abs/physics/0504091). The team says the structure is relatively easy to fabricate and could lead to optical "superlenses" that reflect no light and operate with sub-wavelength resolution.
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