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Terahertz Invisibility Cloak Created

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EVANSTON, Ill., May 4, 2011 — Researchers at Northwestern University have created a cloaking material that can render objects invisible in the terahertz range. Although the design can’t translate into an invisibility cloak for the visible spectrum, it could have applications in diagnostics, security and communication. The cloak uses microfabricated gradient-index materials to manipulate the reflection and refraction of terahertz wavelengths. The material was designed by Cheng Sun, an assistant professor of mechanical engineering, To render an object invisible, light must be manipulated so that it will...Read full article

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