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New communication principle - faster than fiber

04.11.2017

An international team of scientists has been able to build a last mile network in which data is transmitted using so-called "twisted" light, according to the University of Glasgow on its website. This experiment increased the chances that "swirling" light could become the new ubiquitous method of wireless data transmission, and that it would provide transmission speeds higher than fiber optic cable.

A team of physicists from the UK, Germany, New Zealand and Canada has managed to replicate the optical angular momentum, aka the angular momentum, required for "twisted" light to be transmitted unhindered through open space. The scientists were able to impart the necessary spin to photons - individual particles of light - by passing them through a hologram similar to those shown on credit cards.

In traditional digital communications, a photon is used as a one along with a zero to convey information. But due to the twisting effect, the turns of a photon can transmit an additional portion of data, simultaneously with zeros and ones. This ability of theirs should become the basis for a new generation of high-speed wireless data transmission technology. However, despite the use of optical angular momentum in wired transmission of information, it is not easy to use it for open spaces - interference such as atmospheric pressure drops interferes, which leads to loss of data in revolutions.

Now this problem has become solvable. Scientists have built a 1,6 km long last mile wireless network that exists in conditions close to real streets with their high-rise buildings, voids and various kinds of interference. The network was built in Erlangen in Germany. Unlike previous studies, the physicists managed to exhaustively describe the effect of turbulent air on the phase of structured light that propagates through channels of such length.

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Invented a way to prevent fogging glasses 16.12.2022

Scientists from the Swiss Higher School in Zurich used nanotechnology to stop the process of liquid condensation on glass.

The innovative technology consists in creating a special film consisting of two layers of gold and a layer of titanium oxide between them.

A thin (about 10 nm) coating on the glass provides a temperature increase of up to +8 °C. This helps prevent the condensation process from starting. Heating is carried out both at the expense of gold and titanium, but the latter also gives the structure additional strength.

The photo-induced heating effect provides consistent and superior anti-fogging compared to uncoated samples, as well as impressive overall indoor and outdoor performance even in cloudy conditions. The extreme thinness of the coating, obtained using standard, easily scalable manufacturing processes, allows it to be integrated with other coatings, making it durable even on highly compliant substrates.

The authors of the technology promise that the film will not heat up in the summer. They also believe that the application of this film will not affect the cost of the product. Despite the fact that gold is an expensive metal, very little is needed to cover it. In fact, the nanofilm will have a thickness 12 times less than the thickness of gold leaf.

In the future, it is planned to apply an innovative coating on the glass of glasses, as well as on mirrors and car windows. The authors also intend to conduct tests with other metals.

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