Such a cloak does not exist, but early versions that could mask microwaves and other forms of electromagnetic radiation could be as close as 18 months away, Pendry said. "Yes, you could actually make someone invisible as long as someone wears a cloak made of this material," said Patanjali Parimi, a Northeastern University physicist and design engineer at Chelton Microwave Corp. That would give an onlooker the apparent ability to peer right through the cloak, with everything tucked inside concealed from view. Instead, like a river streaming around a smooth boulder, light and all other forms of electromagnetic radiation would strike the cloak and simply flow around it, continuing on as if it never bumped up against an obstacle. Pendry and his co-authors also propose using metamaterials because they can be tuned to bend electromagnetic radiation - radio waves and visible light, for example - in any direction.Ī cloak made of those materials, with a structure designed down to the submicroscopic scale, would neither reflect light nor cast a shadow. Engheta has done his own work on invisibility using novel materials called metamaterials. "This is very interesting science and a very interesting idea and it is supported on a great mathematical and physical basis," said Nader Engheta, a professor of electrical and systems engineering at the University of Pennsylvania. Scientists not involved in the work said it presents a solid case for making invisibility an attainable goal. It's theoretically possible to do all these Harry Potter things, but what's standing in the way is our engineering capabilities," said John Pendry, a physicist at the Imperial College London.ĭetails of the study, which Pendry co-wrote, appear in Thursday's online edition of the journal Science.
"Is it science fiction? Well, it's theory and that already is not science fiction. These materials are intended to steer light and other forms of electromagnetic radiation around an object, rendering it as invisible as something tucked into a hole in space. The keys are special manmade materials, unlike any in nature or the Hogwarts School of Witchcraft and Wizardry. They are laying out the blueprint and calling for help in developing the exotic materials needed to build a cloak.
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Researchers in England and the United States think they know how to do that. WASHINGTON - Imagine an invisibility cloak that works just like the one
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