Broadband Invisibility Cloak - Now You See It
New metamaterial from David R. Smith of Duke (who built the first "invisibility cloak" in 2008 - see Invisibility Cloaks Seen As Possible With Metamaterials) rerouts almost all of the light that hits it.
(Metamaterial works with 1 to 18 gigahertz wavelengths)
It works with wavelengths of light from 1 to 18 gigahertz; this is a band as wide as the visible spectrum. No metamaterials work in the visible spectrum; so, there is no real invisibility cloak. However, this new work shows that it is possible to design a single material that will work with more than just very narrow bandwidths of light.
The broadband cloak is a rectangular structure measuring about 50 by 10 centimeters, with a height of about 1 centimeter. It's made up of roughly 600 I-shaped copper structures. Making each structure is a simple matter, says Smith. "They're copper patterns on a circuit board, cut up and arranged. It's a well-known, inexpensive technology." The hard part is determining the dimensions of each of these 600 structures and how to arrange them. With the first light cloak, which had only 10 such pieces, "we had to design each element by numerical simulations," Smith says.
...the new approach to design will accelerate the development of other metamaterials. Smith says that he and his group have already moved beyond the cloak reported in Science, but because their latest work is unpublished, he can't specify what they've made. "
Science fiction readers remember such early mentions of this idea as the invisible cloak from Ray Cumming's remarkable 1931 novel Brigands of the Moon.
From Technology Review.
Scroll down for more stories in the same category. (Story submitted 1/18/2009)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 2 )
Related News Stories -
Liftware Level, Google's Smart Spoon
'The result was indeed marvelous... I did not stagger and I did not reel.' - Ellis Parker Butler, 1926.
Prufrock The Newest Boring Machine
'It sounds to me as though you had invented a kind of metal earthworm...'
Stratuscent Electronic Nose
'It's picking up diphenyl compounds and tetra hydrocarbons.' - Michael Crichton, 1985.
Smart Contact Lenses Charges With 3D Printed Antenna
'He realized that it was not quite a clear lens.' - Vernor Vinge, 2001.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Liftware Level, Google's Smart Spoon
'The result was indeed marvelous... I did not stagger and I did not reel.'
Cute Teddy Bear Robot Favorite Of Hospitalized Children
'...thought had been given to its programming.'
Google Now Expects Chips To Design Themselves
'What lay down there? Energy, tubes and pipes, wiring, transformers, self-contained machinery...'
PRAM Solar Powered Satellite Hardware Tested In Orbit
'Our beams feed these worlds energy drawn from... the Sun'
3D Printed Glass Uses Stereolithography Techniques
'All that with glass...'
Science Fiction Helps Young Readers Build Resiliency
'Reading science fiction and fantasy can help readers make sense of the world.'
I Want My 1928 Telestereo Hologram Now
'Instantly there appeared standing upon the disk, the image of a man...'
Memes Now Come From Neural Nets
'Your order said for him to be able to be able to work out twists on the gags in the file...'
Robot Dog Learns To Be Doggy From Real Dogs
'So we took pictures of Guzub making a Three Planets, and I could construct this one to do it exactly right down to the thousandth of a second.'
Unwanted Cruise Ships Huddle Together Out At Sea
'On the screen they passed in an endless, boundaryless flood of green specks...'
Sono Sion Electric Car Charges As You Drive
'It drew its power from six square yards of sunpower screens on its low curved roof.'
News Mood Filter Web Extension
'He adjusted the n, the r and b knobs, and hopefully anticipated a turn for the better...'
Fetal Lamb Rests In Artificial Womb
'... stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones, the foetuses grew and grew...'
MIT Wants To Catch Interstellar Visitors
'INVESTIGATE MYSTERIOUS OBJECT ENTERING NEW CALEDONIA SYSTEM FROM NORMAL SPACE'
AutoX Sets Up Asia's Largest Robotaxi Center
'The robot cab seemed to know where it was going and, no doubt, the master machine from which it received its signals knew.'
E - Ink's Automatic Self Styling Color-Changing Dress
'The racks of gowns itched and quivered, their colors running into blurred pools.'
More SF in the News Stories
More Beyond Technovelgy science news stories