It may seem like something out of a "Harry Potter" novel, but the schoolboy wizard in this tale is nowhere to be found. Rather, physicists at Duke University's Pratt School of Engineering and Imperial College London are responsible for the illusion.
Three physicists say they have developed the blueprint for an "invisibility cloak," or fabric, to make physical objects appear as though they have disappeared when they are covered.
The key to making the cloak work comes from an exotic artificial composite called "metamaterials," which could have numerous uses, from defense applications to wireless communications, according to David R. Smith, professor of electrical and computer engineering at Duke's Pratt School.
Smith, along with Duke's Pratt School doctorial candidate David Schurig, and Imperial College London's John Pendry, presented the theoretical papers, on Thursday. It appeared in Science Express, an online science journal. The United States Defense Advanced Research Projects Agency (DARPA) supported the work.
"The ability to hide or conceal things electromagnetically is a method used to design electromagnetic structures," Smith said. "We've been working on the project for about one year, and would have only been considered practical recently. It's been made possible by metamaterials because it can literally transform space, which is difficult to do with conventional material."
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