A clock that can obscure the objects within seems to be an illusory thing, but not anymore as Invisibility cloaks of the fictional world are much more possible in our world.
A group of Researchers at University of California, Berkeley, were able to make a small object disappear using an ultra-thin invisibility skin cloak made of microscopic rectangular gold blocks — just 80 nano-meters thin. It’s the first time scientists have been able to achieve this illusion using their technique.
The cloak is made up of tiny gold brick-like “Nano antennas” that redirect light waves away from the object, making it functionally undetectable. While the cloak itself is 2D, it can cover a 3D object
The researchers said while their experiments involved cloaking a miniscule object they believe the technology could be made to conceal larger objects, with military and other possible applications.
The cloak, 80 nanometers in thickness, was wrapped around a three-dimensional object shaped with bumps and dents. The cloak’s surface rerouted light waves scattered from the object to make it invisible to optical detection.
The “meta surface” of the cloak was designed so that light hitting it “would be the same as that of light reflected from a flat mirror,” according to the team’s research. The study, diffidently called “An ultra-thin invisibility skin cloak for visible light,” was published in the journal Science on Thursday.
Unlike previous attempts at an invisibility cloak, this design is accessible — able to cover larger objects without increasing the thickness of the cloak, and able to conceal objects that have sharp edges and peaks. “Maybe in the future, people can use this as decoration or a wearable,” Xingjie Ni, an assistant professor at Pennsylvania State University, who conceived the research idea and led the team, informed.
It may take five to 10 years to make the technology practical to use, according to Xiang Zhang, director of the Materials Sciences Division of the U.S. Department of Energy’s Lawrence Berkeley National Laboratory and a professor at the University of California, Berkeley.
“We do not see fundamental roadblocks. But much more work needs to be done,” said Zhang, whose research was published in the journal Science.