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Invisible cloak project11/22/2023 When the cloak is not being used, the object along the path of the traveling electromagnetic wave causes the wave to scatter. Otherwise, the electromagnetic waves would bump into the object and scatter in different directions. The researchers found that these layers can hide whatever object they cloak from interacting with electromagnetic waves. The cloak was made out of a gradient-index material with seven superthin layers that each had different electric properties. “The underlying theory can be applied to other wave phenomenon including acoustic and heat waves,” said Yang Hao, professor of antennas and electromagnetics at Queen Mary University of London, who led the study.įor the study, Hao and his colleagues coated a curved metal plate surface, about the size of a tennis ball, with their cloak. In other words, the study suggests a way to make such surfaces invisible. Their research, published in the journal Scientific Reports last week, demonstrates how a so-called “surface wave cloak” can make curved surfaces appear flat when they come in contact with electromagnetic waves. Now, scientists in the United Kingdom have moved a step forward in the real-world quest for invisibility. Rowling storybooks, the young wizard Harry inherited a magical cloak that could make anyone who put it on instantly invisible. "It is possible in principle, but not at this time," Semouchkina says.The world doesn’t have a “Harry Potter”-like invisibility cloak quite yet, but various research teams around the world have been making progress in figuring out how to build one.Ĭreating a cloak that can render a person invisible has been the ongoing dream of materials scientists and Harry Potter fans alike. "The most exciting applications will be at the frequencies of visible light."īeing able to cloak visible light would mean a real-world invisibility cloak, which would have military and police applications, just to name a few. "Starting from these experiments, we want to move to higher frequencies and smaller wavelengths," Semouchkina says. They have been able to cloak metal cylinders two to three inches in diameter and three to four inches high so far. Next up is the use of ceramic resonators and microwave frequencies, with which the researchers plan to hide larger objects, since microwaves are longer than infrared light. Her invisibility cloak uses glass resonators arranged in the shape of a cylinder, which produces the magnetic resonance required to bend light waves around an object, making it invisible. "Ours is the first to do the cloaking of cylindrical objects with glass," Semouchkina says. In computer simulations, the cloak made tiny objects hit by infrared waves disappear from sight. Other researchers have used metal rings and wires to create the illusion, but Semouchkina's research uses glass resonators. Their research was recently published in the journal Applied Physics Letters, and was supported partly by a grant from the National Science Foundation. Semouchkina is an associate professor of electrical and computer engineering at Tech, and has been working with colleagues at Pennsylvania State University on the invisibility cloak project. Michigan Technological University professor Elena Semouchkina is working on making an invisibility cloak a reality, with her research into making small objects appear invisible, using magnetic resonance and glass refraction. Wells and his invisible man, or Harry Potter's magical cloak. It's long been a staple of science fiction and fantasy imaginers to turn things invisible, whether it's H.G.
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