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Federal Research Center 
"Krasnoyarsk Science Center of the Siberian
Branch of the Russian Academy of Sciences"

 Федеральный исследовательский центр «Красноярский научный центр Сибирского отделения Российской академии наук»

Federal Research Center 
"Krasnoyarsk Science Center of the Siberian
Branch of the Russian Academy of Sciences"

Traditional conference of the young scientists took place at the Krasnoyarsk Science Center SB RAS

18 April 2019 г. FRC KSC SB RAS

В Красноярском научном центре СО РАН состоялась традиционная конференция молодых ученых
The traditional conference of the young scientists took place at the Krasnoyarsk Scientific Center. 16 post-graduate students and candidates of sciences from all the scientific institutes of the center presented their reports devoted to a wide range of scientific problems - from the induction of somatic embryogenesis of cedar pines to the Rayleigh anomaly in hybrid photon-plasmonic structures.

The conference winners:
I-st prize – Pyatnov Maxim, “Coupled chiral optical Tamm states in cholesteric liquid crystals”;
II-nd prize – Ershov Alexander “Rayleigh anomalies in hybrid photon-plasmon structures”
II-nd prize – Peretyatko Olga “Morphological characteristic of the epithelial cells of stomach mucous membrane in children in the region with high incidence of stomach cancer”;
III-rd prize – Bychek Anna “Spectral and dynamical characteristics of cold Bose atoms in the multi-well optical potential”;
III-rd prize – Taraban’ko Nikolay “On the nature of the interaction of cellulose with solid acid catalysts in the hydrolysis process”;
III-rd prize – Shestakov Vadim Andreevich (Institute of Physics SB RAS) “Temperature dependent transitions between the  s±  and s++ states in a two-band model of superconductors”.

The report of the conference winner, junior research associate of the laboratory of photonics of molecular systems of the L.V. Kirensky Institute of Physics FRC KSC SB RAS Maxim Pyatnov, was devoted to the study of oscillations caused by the coupling of two chiral optical Tamm states located on the border of self-assembling liquid crystals consisting of rod-like molecules aligned in the form of a spiral of so-called cholesteric crystals.

"Cholesteric liquid crystals are well-proven elements of optical systems. These are birefringent materials with the chirality property. Cholesteric crystals have a photonic bandgap like one-dimensional photonic crystals. However, the position and width of this bandgap can easily be changed by external effects. Unlike the usual photonic crystal materials, cholesteric crystals have the only forbidden zone upon the normal incidence of light. At the same time, this bandgap is present only in the case of the circular polarization coinciding with the twisting of the cholesteric helix. Circularly polarized radiation of the opposite direction is not reflected from such materials. Therefore, structures based on such materials have very interesting polarization features ", - said Maxim Pyatnov.

Their study is due to the need for modern materials with new promising properties in order to create devices for optoelectronics and photonics, for example, for bistable and tristable switches and diodes, optical sensors and filters, and other sensors.

Congratulations to the winners and participants of the conference!