22nd International Young Scientists Conference Optics and High Technology Material Science - SPO 2021 ONLINE

Session

Afternoon Session

12 Nov 2021, 13:30

Online (Taras Shevchenko National University of Kyiv)

Conveners

Afternoon Session

• Vlada Kyrisha ()

Contribution list Timetable

38. Chalcogenide glasses: properties and applications

Alexander Stronski (V.Lashkaryov Institute of Semiconductor Physics NAS kraine)

12/11/2021, 13:30

Invited Lecturer

**In present report the recent results on studies of structural properties of chalcogenides glasses (CG), and their application in holographic recording are reviewed. The changes of optical, thermal and other properties of chalcogenide glasses and functional materials structures on their base are connected with changing of the structure. XRD, EXAFS, AFM, SEM techniques and Raman spectroscopy...

13. Phonons in semiconductor nanocrystals: structure probed by Raman spectroscopy

Volodymyr Dzhagan (V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03038 Kyiv, Ukraine)

12/11/2021, 13:55

Invited Lecturer

Raman spectroscopy is a fast, sensitive, and non-destructive technique for exploring semiconductor nanocrystals fabricated by various methods. Selective probing of electronic and vibrational spectra of different parts of heterogeneous NCs such as core-shell systems by tuning the excitation wavelength in resonant Raman scattering is considered. The analysis of phonon spectra is applied for...

9. Talbot imaging usage for surface step control

Andrey Goloborodko

12/11/2021, 14:20

Oral

The phenomenon of Talbot image formation on the stepped surface is described and demonstrated both theoretically and experimentally. It is well known that when a grating is illuminated by spatially and temporary coherent light beam, it will be self-imaged at a certain distance $Z_T$ along the direction of propagation:
\begin{eqnarray}
Z_T=2\frac{D^2}{\lambda},
\end{eqnarray}
where $D$ is a...

23. Effects of cation substitution in the vibrational spectra of colloidal ternary and quaternary chalcogenide nanocrystals

Nazar Mazur (V.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, Kyiv, Ukraine)

12/11/2021, 14:35

Oral

Compounds of ternary (I-III-VI) and quaternary (I-II-IV-VI) metal chalcogenide nanocrystals (NC) are promising materials for photodetectors and absorber layers of thin-film solar cells of the new (third) generation, fluorophores and low-toxic fluorescent labels for biomedical applications, photocatalytic devices, supercapacitors, and other energy conversion and storage devices. The advantages...

25. OPTICAL POLARIZATION PROPERTIES OF P(VDF-TrFE) COPOLYMER

Andriy Yampolskiy

12/11/2021, 14:50

Oral

P(VDF-TrFE) copolymers actually have a variety of potential applications, e.g. volatile memory, flexible electronics, artificial skin. Anisotropy of their ferroelectric phases make them interesting for optics, from the reasons of polarimetrical phase containment control and potential optoelectronic applications.
Two samples were been fabricated. They are polymer films enclosed between two...

32. Using phase-change materials for ultimate functional reconfiguration at far- and mid-infrared

ANDRIY SEREBRYANNIKOV (Adam Mickiewicz University)

12/11/2021, 15:05

Invited Lecturer

Materials with metal-to-insulator phase transition occurring under the external biasing have an unprecedented potential in control of electromagnetic radiation in a wide frequency range from microwaves to the visible. The focus of this talk is numerical demonstration of how the space of material parameters is connected with the space of functionality at far- and mid-infrared frequencies. The...