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Faster-Than-Light Photons

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GAITHERSBURG, Md., Jan. 27, 2010 – By adding a single, strategically placed layer, researchers can speed up photons to seemingly faster-than-light speeds through a stack of materials. This experimental demonstration confirms intriguing quantum-physics predictions that light's transit time through complex multilayered materials need not depend on thickness, as it does for simple materials such as glass, but rather on the order in which the layers are stacked. A single photon travels through alternating layers of low (blue) and high (green) refractive index material more slowly (top) or quickly (bottom), depending upon the...Read full article

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    Published: January 2010
    Glossary
    optical coatings
    Optical coatings are thin layers of materials applied to optical components, such as lenses, mirrors, filters, and prisms, to modify their reflective and transmissive properties. These coatings are designed to enhance the performance of optical systems by controlling the way light interacts with the surfaces of the components. The primary purposes of optical coatings include: Antireflection coating: This type of coating is designed to reduce reflections from the surfaces of optical...
    AmericaCoatingsdielectric materialsFaster-than-light photonsfiber opticsJoint Quantum InstituteLight Sourceslight waveslights transit timemirrorsNISToptical coatingsOpticsphotonsResearch & TechnologySensors & Detectorssingle photonssuperluminalUniversity of Maryland at College Park

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