![]() Kildishev and Shalaev, all in Purdue's School of Electrical and Computer Engineering.Ĭalculations indicate the device would make an object invisible in a wavelength of 632.8 nanometers, which corresponds to the color red. Chettiar, research scientist Alexander V. The paper, which is appearing online this week, was co-authored by doctoral students Wenshan Cai and Uday K. Research findings are detailed in a paper appearing this month in the journal Nature Photonics. ![]() "But this is a first design step toward creating an optical cloaking device that might work for all wavelengths of visible light," he said. The design does, however, have a major limitation: It works only for any single wavelength, and not for the entire frequency range of the visible spectrum, Shalaev said. Background objects would be visible but not the object surrounded by the cylindrical array of nano-needles, said Vladimir Shalaev, Purdue's Robert and Anne Burnett Professor of Electrical and Computer Engineering. The design, which resembles a round hairbrush, would bend light around the object being cloaked. The Purdue University engineers have created a theoretical design that uses an array of tiny needles radiating outward from a central spoke. Nanotechnologists have taken a step toward creating a device that could render objects invisible by guiding light around anything placed inside an "optical cloak." (2 seconds)ĪpEngineers see progress in creating 'invisibility cloak' * This video shows how light interacts with an uncloaked object. A cloaking device designed using nanotechnology guides light around anything placed inside this cloak. * This video shows how light interacts with a cloaked object. © 2024 NYP Holdings, Inc.Engineers see progress in creating 'invisibility cloak' Last month he released a video of a fish and cat appearing to be made invisible.Įarly forms of the technology are already concealing equipment from electronic eyes. One technique has been demonstrated by Professor Chen Hongsheng at Zhejiang University. “The main approaches are developing materials that guide light away from an object, creating electromagnetic fields to bend light away from what one is trying to hide and copying nature to make hi-tech camouflage materials,” the South China Morning Post reported. The Chinese appear to be focusing on “invisibility” in the visible spectrum. It can also be adapted to change the infra-red “look” of the tank to that of a normal car. On-board cameras pick up the scenery and display it on the vehicle, which can allow a moving tank to match its surroundings. “The US military is among many who have expressed interest in Adaptiv, which could be transferred to other platforms, such as ships and helicopters,” said Mike Sweeney, a spokesman for BAE.īAE’s technology deploys sheets of hexagonal “pixels” that can change temperature very rapidly. “We are invisible people studying invisible technology,” said a researcher involved in the project.Īrms developers such as BAE Systems acknowledge work on this kind of technology which aims to hide armored vehicles. The teams involved include researchers at Tsinghua University and the Chinese Academy of Sciences. The South China Morning Post reports the Chinese army has funded at least 40 research teams over the past three years to develop the idea. BAE Systems’ tank with its IR cloaking system off (top) and on (bottom). And they insist the method is legitimate. News reports from inside China this week have boasted of a new stealth technology that will bend light around and object to conceal its presence – or even change its form. Is it a tank, or is it a car? China and the United States are in a race to develop new “cloaking” technology to hide their military technology from each other’s spying eyes.
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