The Limited Times

Now you can see non-English news...

A turning point for telecommunications from light control

2020-10-21T09:04:14.243Z

It will allow the encoding of huge amounts of information inside the structure of the light itself to send it over great distances without the need for optical fiber and in total safety (ANSA)



Encoding enormous amounts of information inside the structure of the light itself to send it over great distances without the need for optical fiber and in total safety with respect to atmospheric perturbations and interceptions: this is the turning point in telecommunications that could be outlined thanks to the new technique for controlling the light published in the journal Nature Photonics by researchers from the Politecnico di Milano together with the Italian Institute of Technology (Iit) and Rice University.

The new technique uses ultra-thin artificial materials, the so-called metasurfaces, computer designed to have properties never seen in nature and made with advanced nanofabrication techniques by the IIT Clean Room Facility group.

In particular, the researchers used a layer of gold a thousand times thinner than a hair in which tiny cross-shaped structures (billions in a square centimeter) are engraved: when the metasurface is illuminated by pulses of laser light, its optical properties they change radically, but only for a very short time, by about one millionth of a millionth of a second.

During this very short time window it is therefore possible to modulate a second beam of light by 'writing' a bit of information into its structure (polarization).

This unprecedented approach could trigger a revolution in telecommunications, as it will allow information to be encoded in a beam of light at very high frequencies (up to one million million hertz) and transmitted safely and reliably into free space.

Source: ansa

All tech articles on 2020-10-21

You may like

Life/Entertain 2020-09-24T18:59:36.903Z
Business 2020-07-27T17:55:25.502Z
News/Politics 2020-09-05T16:45:12.369Z

Trends 24h

Latest

© Communities 2019 - Privacy