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Innovation

New NIST Metamaterial Gives Light a One-Way Ticket

The light-warping structures known as metamaterials have a new trick in their ever-expanding repertoire.
Researchers at the National Institute of Standards and Technology (NIST) have built a silver, glass and chromium nanostructure that can all but stop visible light cold in one direction while giving it a pass in the other.* The device could someday play a role in optical information processing and in novel biosensing devices.
In recent years, scientists have designed nanostructured

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