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Time Bandits: Temporal Cloaking Hides Events

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ITHACA, N.Y., Jan. 11, 2012 — A “time cloak” technique that makes an event undetectable (albeit on the picosecond scale) is a step toward the development of spatio-temporal cloaking, engineers at Cornell University report. Applied engineering and physics professor Alexander Gaeta and colleagues found that the trick is to create a gap in a beam of light, to have the hidden event occur as the gap goes by and then to stitch the beam back together. It all happens way too quickly to be seen by the human eye: in this case 15 ps, or 15 trillionths of a second (1 ps is to 1 s as 1 s is to 31,700 years). ...Read full article

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    Published: January 2012
    Glossary
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    Alexander GaetaAmericasBasic Sciencecloaking deviceCornell Center for Nanoscale SystemsCornell UniversityDARPAdata transmissionEuropefiber opticshistory editorImperial College LondonJournal of Opticslenseslight beamlight-based computersLondonMartin McCallNatureNew Yorkoptical fiberOpticspicosecondpsResearch & Technologyspatiotemporal cloakingsplit-time lenstime cloakLasers

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