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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

Synthetic Gemstone May Hold Key to Photonic Crystals

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Researchers at AlliedSignal Inc. in Morristown, N.J., have found a new use for synthetic opals. In experiments, the researchers introduced carbon into the faux gemstone's lattice. Then they chemically removed the gem, leaving behind a crystalline array of spheres several hundred nanometers wide. The physical properties of these "inverse opals" could make them important in photonic crystals. Because of their three-dimensionality and regularity, they strongly diffract visible light, which the researchers capitalized on to build an optical switch. The scientists hope the switch might also work...Read full article

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    Published: February 1999
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