Physicists from Moscow state University have created a key part of the light future computers

© Photo : Mikhail Mikhailov, chair of photojournalism and media technologies of the faculty of journalism Malabaricone of nanooptics and metamaterials, Department of physics, Moscow state University,Physicists from Moscow state University have created a key part of the light future computers© Photo : Mikhail Mikhailov, chair of photojournalism and media technologies of the faculty of journalism Goodriches to daily updates RIA Science

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. Russian scientists have created a miniature light Converter suitable for use as a component of future light processors and storage devices. His scheme was published in the journal Physical Review B.

«Our main task was to develop new types of compact frequency converters of optical radiation. Currently, for this purpose, bulk crystals of special materials. The size of these crystals varies from a few millimeters to several centimeters. It is unacceptable for their use in nanophotonics,» explains Boris Afinogenov, of the Department of quantum electronics of the Moscow state University.

Light and other types of electromagnetic waves carry information much more efficiently and faster than electrical signals, making most of the modern communication systems based on fiber optics, and various laser emitters. Scientists have been trying to replace the transistors and the metal tracks inside the chips of their light counterparts, however, it fails to do so for one simple reason – traffic light very difficult to manage.

Over the past two decades engineers and experimenters have created a lot of devices that allows you to manipulate properties of light, but in fact all of them, because of the physical properties of light, have a fairly large size and cannot be reduced.

These problems, as said Afinogenov, scientists overcome using various metamaterials and nanostructures, such as plasmonic resonators or photonic crystals. They convert light into other types of oscillations and then re-emit it in the form of «chunks» of photons with different properties.

Similarly, physicists have learned to control the movement of light, delay, or concentrate it, but to date they have not been able to create a miniature device that would allow you to arbitrarily convert one type of light to another, changing its phase and other properties.

Afinogenov and his team were able to solve this problem by covering the photonic crystal, a set of a plurality of nanoparticles, in a special way and Pereslavsky absorbs light, a thin film of metal.

As shown by experiments of physicists from Moscow state University, the light generated by the photonic crystal, is absorbed and amplified by the metal, the surface of which had a special fluctuations, the so-called Tamm plasmons. They searched for the other type of photons, which, in theory, should not exist inside such crystals. Like pumping the «wrong» light was led to what is inside of them began to form a «comb» of light waves, whose length was two, three or more times shorter than the «forbidden» photon.

Increasing one of these «teeth» of this comb light, it is possible to convert the light entering such a crystal, the radiation pulse with the «right» wavelength, polarization, and other properties. Most importantly, the whole structure, as the researchers note, can be fit into a cube with dimensions of several hundred nanometers.

These nano-devices, according to physicists, can be used not only as components of light, and as ultra-sensitive sensors that respond to occurrence of nanoparticles, molecules and other microscopic objects.

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