Researchers from Cornell say that by using a bit of electromagnetics wizardry they can create a 'hole' in space and keep it hidden - spatial cloaking. Invisible time.
We see things using light, of course, namely as light scatters on an object. Using materials with a negative index of refraction, experiments have been able to create an 'invisibility cloak' for objects, which is certainly exciting. The downside is they are not in the visible range so Romulans are not going to be invading Earth any time soon.
Researchers are reporting the construction of what they term "artificial molecules" and say they can use the technology to engineer a new generation of nanomaterials that control and direct the energy absorbed from light.
Including an antenna that can build itself.
Traditional antennas increase the amount of an electromagnetic wave – such as a radio frequency – that is absorbed, and then funnel that energy to a circuit. These nanoantennas instead increased the amount of light that is absorbed and funneled it to a single site within their molecule-like complexes. This concept is already used in nature in light harvesting antennas, constituents of leaves that make photosynthesis efficient.
University of Utah scientists have used invisible infrared light to make rat heart cells contract. Sounds interesting but not revolutionary, right? But they also used infrared light to cause toadfish inner-ear cells to send signals to their brain - which might improve cochlear implants for deafness.
One thing you probably know about black holes, no matter how much science you took, is that they have never actually been seen. Instead, the science consensus is that masses that sit at the centers of galaxies like our own Milky Way are presumed to be black holes.
Researchers in Nature Physics say a property of light called orbital angular momentum may be detectable because of a 'twist' in this momentum caused by black holes. And we could detect it, if we just know what to look for.
In case you don't know it, the Navy is not the 1970s "Village People" branch of the military. These guys do some cool stuff and are making even cooler toys to do it with.
Want to find future tech for megawatt-class laser beams in next-generation weapon systems? The Navy. Want to go completely science fiction and find work on a railgun with a projectile that rides an electromagnetic current to its target? The Navy.
We know that light has mass and that beaming enough light at something can push it away - solar sails that will move a craft through the cosmos are based on this idea and NASA tested that concept earlier today when it launched NanoSail-D, a nanosatellite (cubesat) which will unfold to a 100 square foot polymer sail and travel in low earth orbit for a few months.Sails? We don't need no stinking sails. Credit: NASA
Physicists from the University of Bonn have developed a completely new source of light, a Bose-Einstein condensate consisting of photons, something not known to be possible, which may potentially be suitable for designing light sources resembling lasers that work in the x-ray range.
By cooling Rubidium atoms deeply and concentrating a sufficient number of them in a compact space, they suddenly become indistinguishable. They behave like a single huge "super particle." Physicists call this a Bose-Einstein condensate.
It's been the decade of metamaterials
, with breakthroughs toward an invisibility cloak
occurring every few months. With conventional materials, light typically travels along a straight line, but with metamaterials, scientists can exploit additional flexibility to create blind spots by deflecting certain parts of the electromagnetic spectrum. Basically, an image can be altered or made to look like it has disappeared.
Quantum cryptography is the technology of the future for military and financial organizations because it sends information as entangled particles of light - anyone who tries to tap into the information changes it in a way that reveals their presence.
The data is encoded with an encrypted key but one important limitation is range. The longest distance over which an encrypted key can be sent is approximately 100 kilometers but new technology developed by researchers increases 30-fold the amount of time the memory can hold information, which means that a series of quantum repeaters, arrayed like Christmas lights on a string, could reach distances in excess of 1,000 kilometers.
Sure, high energy physics costs billions these days (and watch out for birds
- and lightning
) but table-top experiments with tuned lasers and sensitive detectors can also continue to achieve the precision necessary for exploring the basic laws of physics at the heart of relativity and quantum mechanics.