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]

Unlike Brickhouse Security, we won't go so far as to call this thing "invisible," but when placed in the ear, all but the most eagle-eyed among us are likely to overlook it. The elaborately named Secret Service Invisible 2-Way Micro Headset comes with an easily hidden wireless transmitter that plugs into any mobile with a 2.5-millimeter audio output. Once rigged up, the wearer can have someone listen in on conversation in a room while also receiving input from said listener. Unfortunately, this likely Jack Bauer-approved gizmo demands a practically ludicrous $649.95, so it looks like we'll be sticking to brute force and walkie talkies here. Check out a demo video after the jump -- but be sure and kill the speakers first, alright?

[Thanks, Tony M.]

While not the first bunch to try and mesh invisibility with military equipment, the British Army is reportedly staying busy by "testing technology it claims makes tanks and troops invisible." Apparently, the (previously) uber-secret trials were conducted by the Royal Engineers and scientists from QinetiQ, and if eyewitness reports are to be believed, they were able to "make a vehicle seem to completely disappear." The illusion (read: we're no closer to actual invisibility cloaks) was reportedly created by utilizing "cameras and projectors to beam images captured from the surrounding landscape onto a specially-adapted tank coated with silicon to maximize their reflective qualities," and if things go as planned, these elusive machines could make their way onto the battlefield "within five years." 'Course, it's not like anyone will have visual proof of that, but we suppose that's just the nature of the beast.

[Via DailyMail]

We've been following this trend of making stuff invisible for some time now, and the short of it is that invisibility doesn't really quite work as much as we'd like it to for now. But a new result from Northwestern University may be the closest to true "invisible" electronics that we've seen thus far -- honestly, they're really just transparent. A group of scientists, led by Tobin J. Marks, a professor of chemistry, materials science and engineering at Northwestern, have just published a paper in Nature Materials that says that it's possible to produce "transparent, high-performance transistors" on glass and plastics. Dr. Marks said that it was conceivable to be able to construct "displays of text or images that would seem to be floating in space," -- such as a heads-up display of a map built into your windshield, or a visual aid built into a set of goggles for soldiers -- and that new displays based on this technology could be commercially available via his new startup Polyera within 18 months. Heck, if we could use an upgraded version of our bedroom window as a ginormous display to watch TV or movies on, we'd toss our 30-inch LCDs and/or plasma screens in a second.

We've got next-to-invisible objects and cameras with ridiculously large sensors, and thanks to a team of brilliant researchers over in Germany, now we've got "an exotic material with a negative refractive index for visible light." Gunnar Dolling and his colleagues at the University of Karlsruhe in Germany have created a metamaterial with layers of silver sandwiching a thin sliver of nonconducting magnesium fluoride on a glass sheet, and once an array of square holes were etched in, his tests showed that the "structure had a negative refractive index of -0.6 for light with a wavelength of 780-nanometers," besting the previous record of 1,400-nanometers. While the scientific babble may not mean much to you, the long and short of it is that this discovery could "lead to further breakthroughs in invisibility cloaks, which could hide objects from the human eye" and make escaping your troubles quite a bit easier. Moreover, the technology could be used in "superlenses" to see details "finer than the wavelength of visible light," but Dolling is reportedly more interested in studying the effects of his discovery than attempting to build any mystical devices, which is probably for the good of mankind, anyway.

[Via Slashdot]

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]