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Spray-On Flat Lens Works in the UV

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GAITHERSBURG, Md., May 24, 2013 — A metamaterial-based flat lens that's easy to fabricate and that can bend and focus UV light could improve photolithography, nanoscale manipulation and manufacturing, and even high-resolution 3-D imaging, say scientists at the National Institute of Standards and Technology (NIST). The new lens is formed by making a simple sandwich of alternating nanometer-thick layers of silver and titanium dioxide. The resulting flat slab is a metamaterial — a man-made substance with a negative index of refraction: Light entering or exiting the material bends in a direction opposite what would...Read full article

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