Bialystok physicists have discovered new possibilities for ultrafast information recording

An international group of physicists led by Ph. Andrzej Stupakiewicz of the University of Bialystok has proposed a new method of ultrafast information recording, which uses laser pulses to do so. This is the fastest and most efficient method of recording with light.

Method of cold ultrafast information storage discovered by physicistow from the University of Bialystok featured in the pages of a prestigious journal „Nature” last year. New research, ktore are a continuation of those from 2017, appeared in the journal „Nature Communications”.

The method developed in Bialystok is the fastest and most efficient method of recording information using light. Writing and reading data using this technique takes 20 picoseconds (a picosecond is a trillionth of a second). In addition, the process takes place with unprecedentedly low energy losses associated with heat generation during the recording of the.

In a new study, the scientists presented a new concept for selective ultrafast recording of comorec magnetic in a garnet layer doped with ionoin cobalt. Recording is carried out using only ultracrotic pulsesow lasers with a combination of parametersow optics, such as polarization, wavelength and intensity of light – We read in a communiqué published on the website of the University of Bialystok.

According to Stupakiewicz, who is leading the research, this unique opportunity opens the way for a „3D photomagnetic recording”, which would allow even more efficient use of light to store information in digital memories. The researcher explains that this time, together with a team of scientistsow developed „mechanism of selective activation of comorek ionow cobalt o roof crystallographic symmetry”. – In this wayob we have demonstrated how magnetization can be switched more efficiently than before during recording – mowi Stupakiewicz.

The mechanism that allows recording is related to effective resonant optical excitation of specific electron transitions in the garnet layer. Physicists tentatively estimate that even a single photon can switch the magnetization of a comocobalt rec with a volume of just 28 nanometersoin cubic. For porownania is worth recalling that in today’s most capacious terabyte HDDs, stored comoThe bit pipe has a volume of about 4,000 nanometersoin cubic – We read on the website of the Białystok university.

Through the use of „3D recording” A specific area of the layer can be encoded by a light beam with a specific combination of parametersow, using optical telecommunications bandwidth. Future photomagnetic recording technology could use miniature fiber lasers zarowno for recording, as well as for transfer of recorded digital information using already existing optical transmission infrastructure.

What applications the ultrafast method of recording information can have? Of course, computers will run faster, but they will also consume less energy, which will translate into longer laptop operationow without the need to charge them. Such a method will significantly speed up the work of, for example, graphic designersow. 3D graphics rendering, ktore currently takes tens of minutes, with the use of photomagnetic recording and reading technology it will take a few seconds. Processing information with the least amount of energy and at the same time the fastest possible speed can change the face of many industries.

SourceoSource: University of Bialystok, photo. Press materials/University of Bialystok