Feeds

German boffins produce sim of 'invisibility carpet' in action

Don't try sweeping anything important under this

Build a business case: developing custom apps

Remorseless German boffins have developed a simulator which can show how so-called "invisibility carpets" fashioned of metamaterials (in fact more likely to appear in the form of invisible sheds, according to top boffins) would actually appear to the human eye. According to the simulation, the invisible sheds would produce curious ripples and distortions, fairly easily spotted.

How an invisible bump in a floor might look. Credit: KIT

The attempt to sweep everything under the invisibility carpet wasn't terribly successful.

"It's important to visualize how an optical device works," explains Jad C Halimeh, who wrote the software as part of his Master of Science thesis at the Karlsruhe Institute of Technology. Details of the new KIT kit have been published in a scholarly paper, but the actual code hasn't been released yet.

Apparently the standard software that scientists and engineers use to simulate light in a room only allows for a few hundred "volume elements" interacting with the lighting. Halimeh says that to accurately work out the effects of visual-wavelength broadband metamaterials you need hundreds of thousands of elements, which his tech has got.

One should note that nobody has made a metamaterial able to affect visible-light wavelengths, far less a broadband one able to twist all the frequencies the human eye can see. Prof John Pendry, one of the top boffins in the field, has said that advances in nanotechnology might one day make such things possible - but that it won't be a "cloak" as such.

"Despite the hype around Harry Potter, this isn't anything that flaps around in the breeze," the prof has said. "It's more like a shed."

Meanwhile Halimeh and his KIT colleagues, wanting to demonstrate their program, rendered a virtual museum niche with three walls, a ceiling, and a floor. In the middle of the room, there's a bump in the floor - but it's covered in metamaterial invisible-shed cladding (the KIT people prefer to speak of invisibility "carpet") which in theory ought to make an observer see nothing but a flat reflecting floor. However, according to the simulation, this is actually far from the case.

It would seem that in addition to not really being possible, the invisibility cloak/shed/carpet is also fairly crap. The paper, Photorealistic images of carpet cloaks, can be read here (pdf). ®

Securing Web Applications Made Simple and Scalable

More from The Register

next story
Asteroid's DINO KILLING SPREE just bad luck – boffins
Sauricide WASN'T inevitable, reckon scientists
BEST BATTERY EVER: All lithium, all the time, plus a dash of carbon nano-stuff
We have found the Holy Grail (of batteries) - boffins
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
Famous 'Dish' radio telescope to be emptied in budget crisis: CSIRO
Radio astronomy suffering to protect Square Kilometre Array
Bad back? Show some spine and stop popping paracetamol
Study finds common pain-killer doesn't reduce pain or shorten recovery
Forty-five years ago: FOOTPRINTS FOUND ON MOON
NASA won't be back any time soon, sadly
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.