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Scientists use metal and silicon to create invisibility cloak (no, you can't wear it)

Sarah Silbert — Tue, 22 May 2012 15:44:00 EST

In the quest to achieve that much-desired invisibility cloak, scientists have redirected light, used heat monitoring and even gone underwater -- with varying degrees of success. The latest attempt at this optical illusion is from engineers at Stanford and the University of Pennsylvania, who have developed a device that can detect light without being seen itself. When the ratio of metal to silicon is just right, the light reflected from the two materials is completely canceled out. The process, called plasmonic cloaking, controls the flow of light to create optical and electronic functions while leaving nothing for the eye to see. Scientists envision this tech being used in cameras -- plasmonic cloaking could reduce blur by minimizing the cross-talk between pixels. Other applications include solar cells, sensors and solid-state lighting -- human usage is conspicuously absent on that list.

Scientists use metal and silicon to create invisibility cloak (no, you can't wear it) originally appeared on Engadget on Tue, 22 May 2012 15:44:00 EST. Please see our terms for use of feeds.

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Researchers working on thermal cloak, Predators trill their disapproval

Jason Hidalgo — Thu, 29 Mar 2012 04:34:00 EST

Slathering yourself with mud to avoid head-hunting aliens is great and all, but it ain't exactly the paragon of good personal hygiene. Fortunately, researchers have concocted a cleaner and less cakey defense against Predators that's more likely to be mom approved. Fresh on the heels of the microwave invisibility project at the University of Texas at Austin, French researchers have found a way to make a cloak that can hide a subject from thermal imaging devices. The concept uses alternating materials with varying rates of diffusion to move heat around and create a thermally invisible region. Conversely, the technique can be used to concentrate heat in one spot so it gets hot rapidly. Although it doesn't quite have the wow factor of Cornell's invisibility project, the thermal research may prove to be more practical because it also can be used to manage heat and improve cooling in components such as computer chips. Of course, the question now is, can it be used to cloak an entire tank?

Researchers working on thermal cloak, Predators trill their disapproval originally appeared on Engadget on Thu, 29 Mar 2012 04:34:00 EST. Please see our terms for use of feeds.

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Cornell scientists perform optical illusion, herald invisibility through bending of light (video)

Zachary Lutz — Fri, 06 Jan 2012 02:08:00 EST

Taken at face value, you'd almost think that Cornell scientists had successfully bent the fabric of time. With gobs of fiber optics at their disposal, the researchers have devised a method to distort light in a way that makes events in time undetectable to observers. Initial success in this Pentagon-backed invisibility project has cloaked an event for 40 trillionths of a second, leading Cornell scientists to tout, "You kind of create a hole in time where an event takes place. You just don't know that anything ever happened."

The feat is performed by separating light into more fundamental wavelengths, first by slowing the red and speeding the blue. A resultant gap forms in the beam, which leaves a small window for subterfuge. Then, as the light passes through another set of fibers -- which slow the blue and speed the red -- light reaches the observer as if no disturbance had taken place at all. While the brilliant researchers ultimately imagine art thieves being able to pass undetected through museums with this method, the immediate challenge will be in prolonging the light gap. This could prove frustrating, however, due to the scattering and dispersion effects of light. As Cornell scientists dream of their ultimate heist, visual learners will most certainly want to check the video after the break.

Continue reading Cornell scientists perform optical illusion, herald invisibility through bending of light (video)

Cornell scientists perform optical illusion, herald invisibility through bending of light (video) originally appeared on Engadget on Fri, 06 Jan 2012 02:08:00 EST. Please see our terms for use of feeds.

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Invisibility cloak made of carbon nanotubes uses 'mirage effect' to disappear

Lydia Leavitt — Wed, 05 Oct 2011 00:14:00 EST

If the phrase "I solemnly swear I'm up to no good" means anything to you, you'll be happy to know that scientists have come one step closer to a Potter-style "invisibility cloak" so you can use your Marauder's Map to the fullest. With the help of carbon nanotubes, researchers have been able to make objects seem to magically vanish by using the same principle that causes mirages. As anyone who's been especially parched along Route 66 knows, optical illusions occur when heat changes the air's temperature and density, something that forces light to "bend," making us see all sorts of crazy things. Apply the same theory under water using nanotubes -- one molecule carbon coils with super high heat conductivity -- and scientists can make a sheet of the stuff "disappear." Remember, it only works underwater, so get your gillyweed ready and check out the video after the break.

Continue reading Invisibility cloak made of carbon nanotubes uses 'mirage effect' to disappear

Invisibility cloak made of carbon nanotubes uses 'mirage effect' to disappear originally appeared on Engadget on Wed, 05 Oct 2011 00:14:00 EST. Please see our terms for use of feeds.

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BAE's infrared invisibility cloak makes tanks cold as ice, warm as cows

Daniel Cooper — Mon, 05 Sep 2011 16:12:00 EST

Warfare's constantly evolving. Daylight battles became late-night duels, and pre-noon skirmishes shifted to sundown slaughters -- some might say we're just getting lazy, but either way, thermal imaging now plays quite the vital role. Now BAE and the FMV -- Sweden's equivalent to DARPA -- have a way to mask the heat signature of heavy machinery. Adaptiv is a wall of 14 centimeter panels that monitor the ambient heat and match it, so it can't be picked out from the background radiation. The tech can also be used to replicate the profiles of other things -- you know, like a spotted calf or a Fiat 500. BAE believes the tech is scaleable for buildings and warships, the only downside being that all future commanders will have to make sure their operations are finished before dawn. Wouldn't want your soldiers to see that five o'clock (AM) shadow, now would we?

[Thanks, Rob]

BAE's infrared invisibility cloak makes tanks cold as ice, warm as cows originally appeared on Engadget on Mon, 05 Sep 2011 16:12:00 EST. Please see our terms for use of feeds.

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Duke University's underwater invisibility cloak stills troubled waters

Joseph Volpe — Fri, 29 Jul 2011 12:34:00 EST

Everyone's jumping on the invisibility cloaking bandwagon these days, but no one's quite managed to fully deliver on the promise. The same goes for two Duke University researchers who believe their mesh casing could grant the gift of concealment to underwater craft -- submarines, anyone? According to the proposed model, a specially designed shell punctuated by complex patterns of permeability and millimeter-sized pumps would eliminate the drag and turbulent wake caused by an object as it moves through the water. Utilizing the penetrable gaps in the case, water would at first accelerate, and then decelerate to its original speed before exiting -- rendering the fluid around the object virtually undisturbed. Now for the bad news: the design doesn't quite work for large-scale, real-world implementations -- hello again, submarines -- since the tech can only cloak small structures, like "a vehicle one centimetre across... [moving] at speeds of less than one centimetre per second." It's a massive bummer, we know, but we're getting there folks -- you just won't see it when it actually happens.

Duke University's underwater invisibility cloak stills troubled waters originally appeared on Engadget on Fri, 29 Jul 2011 12:34:00 EST. Please see our terms for use of feeds.

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Duke University physicists test first air-based acoustic invisibility cloak

Joseph Volpe — Sat, 25 Jun 2011 16:19:00 EST

Firmly departing from the Stuff Of Dreams category, Duke University physicists have successfully tested an acoustic cloaking device that fools sound waves while looking nowhere near as scifi as you'd think. Layering nothing more than a bunch of hole-punched plastic sheets -- known as meta-materials, for those curious -- atop a ten centimeter long block of wood, highly-directed sound in the 1 - 4kHz range bounced right off the concealed object none the wiser. The cloaking tech owes some of its origin to the math behind transformation optics -- and maybe to the Duke team, too. Besides allowing defense department bunkers to erupt into silent applause, the research should prove useful in the construction of future concert halls. DIY hobbyists, let us know what you can rig up with some trash bags.

[Thanks, Drew]

Duke University physicists test first air-based acoustic invisibility cloak originally appeared on Engadget on Sat, 25 Jun 2011 16:19:00 EST. Please see our terms for use of feeds.

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Metamaterial printing method inches us closer to invisibility cloaks

Terrence O'Brien — Mon, 13 Jun 2011 19:27:00 EST

In theory, metamaterials are all kinds of awesome -- they can boost antenna strength, focus lasers, and create invisibility cloaks. But, they've been limited to ~~day dreams~~ lab experiments because producing the light-interfering materials in any practical quantity has been difficult and time consuming. John Rogers, a professor at the University of Illinois has figured out a way to print a layered, nano-scale mesh that bends near-infrared light in much larger amounts than previously possible. The new method, based around a plastic stamp, has been used to create sheets of metamaterial measuring a few square inches, but Rogers is confident he can scale it up to several feet. Who knows, by the time the second installment of The Deathly Hallows hits theaters in July you could get the best Harry Potter costume -- one that lets you sneak in without shelling out $13.

[Thanks, Plum G.]

Metamaterial printing method inches us closer to invisibility cloaks originally appeared on Engadget on Mon, 13 Jun 2011 19:27:00 EST. Please see our terms for use of feeds.

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Inhabitat's Week in Green: sugar-covered lamps, IKEA's solar lamp, and the 30MPH all-wood racing bike

Inhabitat — Sun, 01 May 2011 22:00:00 EST

Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green.

Several breakthroughs sent shock waves through the field of renewable energy this week as Inhabitat reported on a new type of "invisibility cloak" that could supercharge solar cells and researchers at MIT harnessed viruses to improve the efficiency of dye-solar cells by a full third. We also cast a keen eye on the royal wedding, which is expected to produce 6,765 tons of CO2, and we explored a new wireless charging technology being developed by Toyota and WiTricity. And if futuristic eco cities float your boat, check out this self-sustaining ecotopia designed to produce energy and food in the North Sea.

We also showcased several novel electric vehicles, including the crazy Uno 3 transforming scooter which is now available for pre-order. Alternative fuels also took off as a Kentucky man unveiled a car that runs on bourbon and a mobile greenhouse powered by renewable energy hit the streets of New York City. And from the realm of pedal-powered transportation we brought you the SplinterBike - a bicycle made entirely from wood that can hit a record-breaking 30 miles per hour.

In other news, energy-efficient lighting advanced by leaps and bounds this week as we flipped the switch on IKEA's new solar-powered Solvinden lamp and we spotted a crystalline "Stardust" LED lamp made from sugar at the Milan Furniture Fair. Finally, we shined a spotlight on Katy Perry's debut on American Idol as a LED-studded Extraterrestrial, and we took an exclusive look inside New York City's first LEED gold skyscraper - the Hearst Tower!

Inhabitat's Week in Green: sugar-covered lamps, IKEA's solar lamp, and the 30MPH all-wood racing bike originally appeared on Engadget on Sun, 01 May 2011 22:00:00 EST. Please see our terms for use of feeds.

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Flexible metamaterial could make your next invisibility cloak rather more comfortable

Tim Stevens — Tue, 09 Nov 2010 15:06:00 EST

Metamaterials have a lot of potential future applications, but only one of them really gets our geeky senses tingling: invisibility cloaks. Previous theoretical examples we've seen were built upon rigid silicon substrates, meaning they'd be about as comfortable to wear as a motherboard jacket with ISA sleeves. But, a new material at the University of St. Andrews has been created that offers similar light-bending properties in a flexible package, crafted by the formation of a membrane upon a release layer, etching microscopic gold bars upon it, and then removing the release layer to have just the blingy membrane left behind. It can be tuned to bend various wavelengths, with the team having success working at wavelengths as short as 620nm -- you know, red. If there's one problem it's the size of the thing, with current prototypes measuring just 5 x 8mm, but it is said to be "scalable to industrial levels," meaning next-year's Harry Potter costume could be the best one ever.

Flexible metamaterial could make your next invisibility cloak rather more comfortable originally appeared on Engadget on Tue, 09 Nov 2010 15:06:00 EST. Please see our terms for use of feeds.

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Invisibility cloak upgraded to bend infrared light, not to mention our minds

Sean Hollister — Tue, 27 Jul 2010 07:50:00 EST

The fabled cloak of invisibility was once considered impossible for modern science, chilling out with perpetual motion up in the clouds, but these days scientists are tilting at blurry windmills with a modicum of success several times a year. The latest advance in theory comes to us from Michigan Tech, which says it can now cloak objects in the infrared spectrum. Previous attempts using metallic metamaterials could only bend microwave radiation, the study claims, but using tiny resonators made of chalcogenide glass arranged in spokes around the object (see diagram at left) researcher Elena Semouchkina and colleagues successfully hid a simulated metal cylinder from 3.5 terahertz waves. While it's hard to say when we might see similar solutions for visible light, even a practical application of infrared cloaking could put your night vision goggles to shame, or perhaps block covert objects from being detected by those newfangled terahertz x-rays.

Invisibility cloak upgraded to bend infrared light, not to mention our minds originally appeared on Engadget on Tue, 27 Jul 2010 07:50:00 EST. Please see our terms for use of feeds.

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3D invisibility cloak fashioned out of metamaterials

Vlad Savov — Fri, 19 Mar 2010 08:51:00 EST

Those HDTV manufacturers did tell us that 3D was going to be everywhere this year, didn't they? Keeping up with the times, scientists investigating potential methods for rendering physical objects invisible to the human eye have now moved to the full three-dimensional realm. The Karlsruhe Institute of Technology has developed a photonic metamaterial that can make things disappear when viewed from all angles, advancing from previous light refraction methods that only worked in 2D. It sounds similar to what Berkeley researchers developed not too long ago, and just like Berkeley's findings, this is a method that's still at a very early stage of development and can only cover one micrometer-tall bumps. Theoretically unlimited, the so-called carpet cloak could eventually be expanded to "hide a house," but then who's to say we'll even be living in houses by that time?

3D invisibility cloak fashioned out of metamaterials originally appeared on Engadget on Fri, 19 Mar 2010 08:51:00 EST. Please see our terms for use of feeds.

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Video: simulated 'quiet zone' cloaking hides an object in 2-D

Tim Stevens — Mon, 17 Aug 2009 09:07:00 EST

You don't have to be able to pick a Romulan out of a crowd of Vulcans to be intrigued by the idea of cloaking, and indeed many non-trekkers have tried to hide things in plain sight using electromagnetism, acoustic superlenses, or light-bending materials. The latest attempt relies on devices that emit cancelling waves of the sort anyone who's ever seen a Bose commercial should quite familiar with, combining to negate any external, incoming waves. What's different here is that they also recombine on the other side of the object being cloaked, as shown in the video below, meaning that incoming surge is then re-generated and continues on undisturbed -- potentially even reflecting back through the object again should it hit something on the far side. It's part of research at the University of Utah and, for now, only works in a theoretical two-dimensional world where triangles and squares are ruled by pentagons, hexagons, and priestly polygons. Optical camouflage is sadly not believed to be possible using this technique, but sonar and radar are likely implementations, as well as mechanisms to subvert earthquakes, tsunamis, and maybe even neighboring speed metal fans.

Continue reading Video: simulated 'quiet zone' cloaking hides an object in 2-D

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Video: simulated 'quiet zone' cloaking hides an object in 2-D originally appeared on Engadget on Mon, 17 Aug 2009 09:07:00 EST. Please see our terms for use of feeds.

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Electromagnetic invisibility a precursor to the real thing?

Vlad Savov — Mon, 20 Jul 2009 11:50:00 EST

This could either be that one giant leap, or just another in a long sequence of multidirectional small steps on the Quixotic quest for undetectability. So-called dc metamaterials are the chief culprit for inciting our interest anew, as researchers from Universitat Autònoma de Barcelona have found a way to use them to render metallic objects invisible to low frequency electromagnetic waves. Composed of irregular networks of superconductors, the metamaterials are capable of ~~granting superpowers~~ altering the magnetic field of materials, and in theory, this advance could aid magnetic imaging in medical settings and also help cloak military vessels from magnetic detection. Of course, there's still the whole "oh, now we need a working prototype" conundrum, but hey, at least we've got the gears turning in the right direction.

[Via PhysOrg]

Filed under: Science

Electromagnetic invisibility a precursor to the real thing? originally appeared on Engadget on Mon, 20 Jul 2009 11:50:00 EST. Please see our terms for use of feeds.

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Invisibility cloak modified to make you see things that aren't there

Laura June — Tue, 07 Jul 2009 10:54:00 EST

The ever-evolving tale of the invisibility cloak makes us want to hang our heads in our hands sometimes, so fraught with frustrations does it seem. Well, another chapter's been added to the tome: researchers at the Hong Kong University of Science and Technology have devised a way to extend the invisibility principle, allowing an illusion to sit in place of the invisible object. So, say you wanted to use an invisibility cloak to mask the presence of your bottle of beer on the table, the new concept -- or 'shroud of lies' as we call it -- would enable you to make it appear that there was a glass of water sitting there, in place of the beer. So how does that work, exactly? Normal, every day invisibility cloaks bend light around a central cavity, whereas the team has now worked out mathematical rules for bending light in other ways, allowing a material to be designed to bend light in the exact way a spoon would, so that the light hitting the material would distort, making it look like a spoon was there. Theoretically, all of this is rather simple and quite sound, though it turns out that there are numberless mechanical obstacles standing in the way of producing such devices. The new illusion-producing device would have to be capable of working without interfering with the invisibility cloak itself (which, if you recall, also can't properly be said to exist). There's no word on when any of this will ever come to fruition of course, but we remain always hopeful.

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Acoustic superlens could mask ships from sonar... in theory, anyway

Darren Murph — Sun, 31 May 2009 21:32:00 EST

Man, the mad scientists are really on a roll of late. First we hear that Li-ion cells are set to magically double in capacity, and now we're learning that a new form of invisibility cloak is totally gearing up for its Target debut. As the seemingly endless quest to bend light in such a way as to create a sheath of invisibility continues, the University of Illinois at Urbana-Champaign's Nicholas Fang has reportedly developed a metamaterial that acts as a type of acoustic superlens. In theory, at least, this approach would rely on phreaking with sound rather than light in order to intensely focus ultrasound waves; by doing so, one could hypothetically "hide ships from sonar." To be fair, this all sounds entirely more believable than hiding massive vessels from human sight, but we're still not taking our skeptic hat off until we see (er, don't see?) a little proof.

[Via Slashdot]

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Purdue researchers concoct new invisibility cloak, plan Walmart debut

Darren Murph — Fri, 22 May 2009 09:21:00 EST

Hate to say it, but we're beyond the point of hope here. We just won't ever, ever see a real-deal invisibility cloak during our relatively brief stint on Earth. That said, researchers at Purdue University are doing their best to prove us wrong, recently developing a new approach to cloaking that is supposedly "simple to manufacture." Unlike traditional invisibility cloaks, which rely on exotic metamaterials that demand complex nanofabrication, this version utilizes a far simpler design based on a tapered optical waveguide. A report from the institution asserts that the team was able to "cloak an area 100 times larger than the wavelengths of light shined by a laser into the device," but for obvious reasons, it's impossible to actually show us it happened. Regardless, for the sake of the kiddos above, we're hoping this stuff gets commercialized, and soon.

[Via Digg, Image courtesy of Thomas Ricker (yes, that Thomas Ricker)]

Continue reading Purdue researchers concoct new invisibility cloak, plan Walmart debut

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Purdue researchers concoct new invisibility cloak, plan Walmart debut originally appeared on Engadget on Fri, 22 May 2009 09:21:00 EST. Please see our terms for use of feeds.

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Quest for invisibility cloaks revisited by two research groups

Ross Miller — Thu, 30 Apr 2009 05:26:00 EST

After a brief period of no news, it's time to revisit the world of invisible cloaks. Inspired by the ideas of theoretical physicist John Pendry at Imperial College, London, two separate groups of researchers from Cornell University and UC Berkeley claim to have prototyped their own cloaking devices. Both work essentially the same way: the object is hidden by mirrors that look entirely flat thanks to tiny silicon nanopillars that steer reflected light in such a way to create the illusion. It gets a bit technical, sure, but hopefully from at least one of these projects we'll get a video presentation that's sure to make us downright giddy.

Filed under: Misc. Gadgets, Wearables

Quest for invisibility cloaks revisited by two research groups originally appeared on Engadget on Thu, 30 Apr 2009 05:26:00 EST. Please see our terms for use of feeds.

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Cloaking device puts the kibosh on cellphone interference

Joseph L. Flatley — Thu, 15 Jan 2009 21:20:00 EST

There has been plenty of research into cloaking devices, but while scientists are still working their way towards the visible light spectrum they seem to be having the best luck with microwaves. Most recently, a new metamaterial made from over 10,000 individual pieces of fiberglass has been used to cloak a bump on a flat mirrored surface -- the material prevents microwaves from being scattered, giving the RADAR (we're guessing it's a RADAR) the impression that the surface is flat. This has many possible applications, such as cloaking sources of interference to cellular communications. Unfortunately, the implication we most desire -- rendering us invisible during high society jewel heists -- has yet to become reality.

Filed under: Cellphones

Cloaking device puts the kibosh on cellphone interference originally appeared on Engadget on Thu, 15 Jan 2009 21:20:00 EST. Please see our terms for use of feeds.

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Cloaking device puts the kibosh on cellphone interference

Joseph L. Flatley — Thu, 15 Jan 2009 19:59:00 EST

Filed under: Studies

Cloaking device puts the kibosh on cellphone interference originally appeared on Engadget on Thu, 15 Jan 2009 19:59:00 EST. Please see our terms for use of feeds.

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Researchers create light bending material for invisibility cloak

Thomas Ricker — Mon, 11 Aug 2008 05:25:00 EST

We're only at the nano scale folks so you'll have to keep those high school fantasies of an invisibility-cloaked romp through the girls' locker room tucked away for now. Still, two teams of US government funded researchers under the direction of Xian Zhanga at UC Berkeley say that they've developed a material which can bend visible light around 3D objects, effectively making them disappear. While similar to the negative refractive properties of materials developed back in 2006, UCB's so-called meta-material is easier to work with and absorbs far less light than those earlier products. As such, the material could scale to the size of invisibility cloaks to hide objects such as tanks or mischievous boy-wizards. However, that day is a long ways off. In the short term, the meta-material will most likely find use in the far less interesting (to consumers, anyway) application of building better microscopes. Hey, Xian, picture of your invisible material or it didn't happen... oh, wait.

[Via BBC News]

Filed under: Misc. Gadgets, Wearables

Researchers create light bending material for invisibility cloak originally appeared on Engadget on Mon, 11 Aug 2008 05:25:00 EST. Please see our terms for use of feeds.

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Researchers say three-dimensional sound cloak is possible, in theory

Donald Melanson — Thu, 10 Jan 2008 12:51:00 EST

Apparently not content with simply building an invisibility cloak, of sorts, those mad scientists at Duke University's Pratt School of Engineering now say that they've found that a three-dimensional "sound cloak" is also possible, in theory. According to Duke's Steven Cummer, the researchers have come up with a "recipe" for an acoustic material that would "essentially open up a hole in space and make something inside that hole disappear from sound waves." Needless to say, they haven't tested that possibility just yet, but they say it could one day be used to hide submarines from detection by sonar or even be used to improve the acoustics of a concert hall by making inconvenient structural beams effectively disappear. What's more, they say that the basic principles at play here could also suggest that cloaks could be created for other wave systems, like seismic waves, or even waves at the surface of the ocean, although the practical applications for those would seem to be a bit more limited.

[Image courtesy of Royal Navy/BAE Systems]

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Researchers say three-dimensional sound cloak is possible, in theory originally appeared on Engadget on Thu, 10 Jan 2008 12:51:00 EST. Please see our terms for use of feeds.

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Duke scientists build theorized invisibility cloak. Sort of.

Cyrus Farivar — Thu, 19 Oct 2006 19:20:00 EST

Yes, everyone wants an invisibility cloak. Yes, it's been theorized and in development before. But now, what our friends across the pond have only imagined, scientists at an American university have actually built. A group of brainiacs at Duke University have built a device (based on the Imperial College London theory) that can deflect microwave beams so the beams flow around an object almost as if nothing was there, with not too much distortion (but only in two dimensions). In order to do this, the group built a series of concentric circles made up of "metamaterials," or "artificial composites that can be made to interact with electromagnetic waves in ways that natural materials cannot reproduce." Don't get too excited yet, as scientists warn that this is merely a "baby step." The next step is to make the cloak work in three dimensions, and make improve the cloak's effectiveness. And even still, we're a long way off from making something completely disappear from visibility, which "would have to simultaneously interact with all of the wavelengths, or colors, that make up light." said David R. Smith, a member of the research squad. Hey Duke team, if you ever need human test subjects, we'd definitely be willing to volunteer.

[Via The Associated Press]

Filed under: Misc. Gadgets

Duke scientists build theorized invisibility cloak. Sort of. originally appeared on Engadget on Thu, 19 Oct 2006 19:20:00 EST. Please see our terms for use of feeds.

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UK scientists working on cloaking device

Marc Perton — Thu, 25 May 2006 16:14:00 EST

We've heard of these kinds of guys before. They've spent too much time engrossed in Harry Potter books or old Star Trek episodes, and dream of some sort of device that will make them invisible. Every couple of years, one of them surfaces with a new idea about a "cloaking device" that can bend light around solid objects, making them appear to be invisible. This time, two separate teams in the UK are racing to show that the concept is feasible. One group, at Imperial College in London, believes that light-bending metamaterials can be produced within the next decade. Meanwhile, two mathematicians have published a study in the Proceedings of the Royal Society, which claims that a "superlens" placed close to an object could produce an "anomalous localized resonance," essentially rendering the underlying object invisible by creating a phantom light wave using the same frequency. The scientists envision building a device soon -- one that could conceivably cloak particles of dust. We'll check back with both parties in a few years. In the meantime, we'd like to present our detailed artist's rendering, prepared at great cost and with much research, which we believe truly shows what a cloaked object will look like to the naked eye.

Read - Metamaterials
Read - Superlens

Filed under: Misc. Gadgets

UK scientists working on cloaking device originally appeared on Engadget on Thu, 25 May 2006 16:14:00 EST. Please see our terms for use of feeds.

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