Cloaking Devices Predator Style May Come Soon

McCall and Paul Martin Kinsler, two physicists from Imperial College London published an article in this month's issue of Physics World, where they discussed the physics involved in creating a cloaking device predator- style.

Now a group of researchers at Cornell University began experimenting with different ways to achieve the same results. Alexander Gaeta and colleagues used a technique involving the use of two "lenses part-time" (STL). The operation is as follows: the first in the STL divides a beam into two parts one is delayed in time and the other is advanced. STL second does the opposite, closing the gap in time.

So far, their experimentation with the technology seems promising.

McCall expressed interest in research:

We were very pleased that our concept has been experimentally realized - he did not quite use the same technique that we propose, but I think it may well claim to be the first experimental observation of the signature long coat.

Unfortunately we are unable to hear more from Gaeta team for some time, because their research has been forthcoming article in Nature. Until then, we have an abstract, which you can read below.

Demonstration of the temporal cloaking

Recent research has shown a remarkable ability to manipulate and control the electromagnetic fields that produce effects such as picture-perfect and cover-up space. Space to achieve invisibility, the index of refraction manipulates the flow of the probe light around an object so that a "hole" in space is created, and that remains hidden. Alternatively, it may be desirable to cover the occurrence of an event in a finite time, and the idea of ​​camouflage time was proposed in the dispersion of the material is handled in time to produce a hole of time "" in the beam try to hide the occurrence of the event from the observer. This approach is based on the acceleration and deceleration of the front and rear respectively of the probe beam to create a well-controlled period of time in which the event occurs so that the beam of the probe has not changed in any way by the event. The probe beam is restored to its original form by manual manipulation of the dispersion.

Here we present experimental evidence of the cloaking time, applying the concepts of space-time duality between the dispersive diffraction and expansion. We characterize the performance of our cloak by detecting the temporal variation in the spectrum of the optical probe beam due to interaction while the robe off and on, and show that an event is detected when the coat is off, but it can detect when the coat is lit. These results represent a significant step toward developing all the time and region.