Investigation team will slightly slow down in any color for faster internet




An international team of scientists has managed to delay a large amount of light frequencies simultaneously. In time, this technique could help to make more efficient optical communications.

According to the Free University of Brussels, the scientists have discovered a new method to slow light. There are already ways to slow down light waves with certain frequencies, but which have no effect on the speed of the other frequencies. “Therefore, in such systems are always a compromise between the degree of light is slowed and the amount of colors used for work,” it reads in the words of the VUB. As a result, these techniques would not be useful for optical communications.

A lower speed of light allows researchers in the future might be able to light in optical communications to lead effectively in the right direction, which can promote the flow. The university also states that the energy consumption of network components such as optical routers and switches may drop because they can work more efficiently when light passes through the slower circuits.

The researchers based their method on the interaction between a light pulse, and a thin-layer meta-material. Meta Surfaces have influence on light waves in phase and can thus manipulate optical signals. They have a two-dimensional structure of which the electromagnetic properties are determined by elements which resonate at subgolflengtes.

The scientists propose to design metadata surfaces that imitate thicker three-dimensional surfaces. “This particular configuration creates the light illusion that the distance to be much larger than the actual physical distance and thus slows in practice the light to randomly determine low speed,” the VUB.

The study was conducted by Vincent Ginis of VUB, Philippe Tassin Chalmers University, and Thomas Koschny and Costas Soukoulis of Iowa State University. They publish their work under the title Broadband meta surfaces enabling arbitrarily large delay-bandwidth products in the scientific journal Applied Physics Letters.


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