by Staff Writers
Austin, Texas (UPI) Jan 26, 2012
U.S. researchers say they have "cloaked" a three-dimensional object, making it invisible from all angles for the first time.
The process uses a shell of what are known as plasmonic materials that create a "photo negative" of the object being cloaked, effectively canceling it out.
However, the demonstration has only been achieved for waves in the microwave region of the electromagnetic spectrum, not for visible light.
Andrea Alu and colleagues at the University of Texas at Austin have made a 7-inch-long cylinder invisible to incoming microwave light.
The success with the cylinder suggests further work with different wavelengths of light is worth pursuing, Alu said.
"It's a real object standing in our lab, and it basically disappears," he told BBC News.
While the technique is unlikely to work at the visible light part of the spectrum, Alu said, the approach could be applied to the tips of scanning microscopes to yield an improved view of even smaller wavelengths of light.
Space Technology News - Applications and Research
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Salk scientists map the frontiers of vision
La Jolla CA (SPX) Jan 10, 2012
There's a 3-D world in our brains. It's a landscape that mimics the outside world, where the objects we see exist as collections of neural circuits and electrical impulses. Now, scientists at the Salk Institute for Biological Studies are using new tools they developed to chart that world, a key step in revolutionizing research into the neurological basis of vision. For the first time, the ... read more
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