[en] The collection contains abstracts of the reports of the First All-Russian scientific conference with international participation «Yenisei Photonics – 2020» which was held in Krasnoyarsk on 14-19 September, 2020. The problems of coherent optics and laser physics, nanophotonics and metamaterials, spectroscopy of condensed matter, as well as photonic crystals and topological phases are considered

[en] Single molecule spectroscopy and fluorescence nanoscopy offer a wide range of possibilities for studying the photophysical characteristics of various luminescent nanoobjects and composites on their base. The microscopic nature of the flickering photoluminescence effect of single quantum dots, the results of studies of local field effects, as well as the processes of spectral diffusion and electron-phonon interaction in impurity polymer media with quantum dots and organic molecules are discussed. The results of a comparative analysis with data obtained by other methods (photon echo, Raman and electron microscopy) are presented

[en] Optical and luminescent properties of microcrystalline hafnium dioxide powder have been studied. It has been established by X-ray diffraction that the samples under study have a monoclinic crystal lattice. Based on the study of diffuse reflectance spectra, the band gap was estimated to be E_g=5.35±0.05 eV. The presence of luminescence at 2.55 eV in the photoluminescence spectra indicates the presence of optically active centers based on oxygen vacancies

[en] The main advantages of colloidal quantum dots as building blocks of photonics are considered. The fundamentals and recent advances in the field of polymer, all-inorganic and hybrid encapsulation of light-emitting nanocrystals are outlined, including “classical” CdSe and CdTe-based quantum dots, as well as Cd-free and lead-halide perovskite nanomaterials. Our strategies allow to adust the nanocrystal loading, to design emission color and to control form and thickness of the resulting composite

[en] The possibilities of formation are discussed and the properties of heterostructures of the first kind with an indirect band structure based on A3B5 semiconductor compounds with (001) and (111) substrate orientations are described

[en] The topological phase of a light wave while its propagating in an anisotropic medium is described in the formalism of Jones matrices. The equivalence of the topological phase description in the language of quaternions is shown, while the change of light polarization is displayed on the Poincare sphere. As an example, localized optical modes in a photonic crystal with an anisotropic defect are considered

[en] In accordance with model calculations, one-dimensional photonic crystals (OPC) based on SiO₂/Si₃N₄ have been synthesized using plasma chemical vapor deposition. A good agreement has been obtained between the experimental and calculated data in terms of the optical properties of the OPC. Based on the synthesized OPCs, optical elements with a gold sublayer have been obtained for the experimental observation of the Tamm plasmon-polariton

[en] The possibilities of spectroscopic differentiation of individual types of luminescent radiation-induced defects in condensed media are studied. The feasibility and efficiency of the laser confocal scanning luminescent spectroscopy of single radiation defects has been experimentally confirmed by the characteristics of their photoluminescent trajectories. Dynamic models of F₂ and F₃⁺ centers in lithium fluoride crystals are constructed, the data of which are in good agreement with the experimental one

[en] A series of MoS₂ layered flakes samples with 1-10 μm thickness is studied, in which a strong optical anisotropy is observed, which can be explained by the influence of stress or shear deformation. It is found that the intensity of transmitted light in crossed polarization reaches a maximum when the incident light is polarized along a certain axis. The degree of circular polarization of the transmitted light is also different from zero

[en] Based on a one-dimensional photonic crystal of excess thickness, the period of which slowly changes with depth, a spectrometer of compact (less than 5 mm) size has been created. It covers the 200-1100 nm range, has low intensity losses and does not require diffraction order filtering