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Nelson Nientsu Hua (PSI - Paul Scherrer Institut)02/11/2026, 09:30
X-ray free-electron lasers (XFELs) offer two key advantages over synchrotron sources for studying ultrafast phenomena: superior temporal resolution and significantly higher coherent photon flux. Here, I will highlight how these two capabilities can be exploited to investigate nonequilibrium phase transitions in quantum materials using time-resolved X-ray scattering. First, I will demonstrate...
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Thomas Pezeril (Institut de Physique de Rennes, UMR CNRS 6251, Rennes, France)02/11/2026, 10:00
Pulsed lasers are routinely used to excite and detect acoustic waves over a broad frequency range, from MHz to THz. Laser ultrasonics enables non-contact, non-invasive, and non-destructive mechanical probing of samples with dimensions ranging from millimetres to nanometres. Although established for decades, the technique is constrained by optical damage thresholds, which typically limit the...
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Dr Ritwika Mandal (Institut des Matériaux de Nantes Jean Rouxel, 44322 Nantes, France)02/11/2026, 10:40
Control of light-matter interaction in quantum materials offers a pathway to access non-equilibrium states with emergent functionalities beyond thermal equilibrium [1, 2]. In strongly correlated systems, particularly those involving large volume changes associated or not to a symmetry breaking, ultrafast laser excitation can drive phase transitions [3, 4]. Recent work [5] further highlights...
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Hervé Cailleau (Institut de Physique de Rennes, University of Rennes and CNRS, France)02/11/2026, 11:25
Thanks to remarkable developments of ultrafast techniques operating on a few fs, i.e. faster than atomic motions, many functionalities of materials can be manipulated on demand in unprecedented ways [1]. Thus, ultrafast laser systems allow to photoexcite a macroscopic number of carriers (typically few percent of valence band electrons) and hence to strongly perturb the electronic state of...
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Damien Léa (Univ Rennes, CNRS, IPR (Institut de Physique de Rennes))02/11/2026, 12:05
Ti₃O₅ exhibits a photoinduced insulator-to-metal transition (IMT) at room temperature, offering promising technological applications such as optical data storage based on the bistability of its insulating and metallic phases at the nanoscale, and thermal energy storage enabled by the transition’s large latent heat [1,2]. Understanding the mechanisms governing the transition dynamics remains a...
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Denisa Colțuneac (Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000 Rennes, France/ University Alexandru Ioan Cuza of Iasi, Faculty of Physics, 700506 Iasi, Romania)02/11/2026, 12:35
Titanium oxide Ti$_3$O$_5$ is a remarkable transition-metal oxide that exists in a few crystal phases and can be switched reversibly between them by temperature, pressure or light excitation[1]. The transition between its $\beta$ and $\lambda$ phases is first-order and is accompanied by a change in its electronic and optical properties, which makes the material a good candidate for optical...
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Elizabeth Marie Skoropata (PSI - Paul Scherrer Institut)02/11/2026, 12:50
I will describe the THz induced dynamics of an SrTiO3 thin film with a nanoscale ordered interfacial dislocation network probed with 2- and 3-dimensional time-resolved X-ray diffraction and classical molecular dynamics simulations. I will share our findings that reveal that symmetry breaking at all length scales is an effective means to create dynamical electric polarization and to control...
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Lukáš Nádvorník (Charles University, Prague, Czech Republic)02/11/2026, 14:10
Magnons, the elementary excitations of magnetic order, offer a promising route towards ultrafast information processing without charge transport. However, generating sub-picosecond magnon pulses that propagate over technologically relevant distances without losing coherence or broadening has remained a major challenge. Achieving this combination requires broadband excitation, coherent phase...
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Artem Levchuk (LSI, Ecole Polytechnique)02/11/2026, 14:50
Between microwaves and the infrared, terahertz (THz) radiation was long hard to produce and to measure. Yet it is the natural frequency range of many low-energy excitations in condensed matter: lattice vibrations, spin waves and the motion of free carriers all leave their signatures there. A THz pulse can both probe these excitations and drive them, on a subpicosecond timescale [1]. Thanks to...
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Peter Kubaščík (Faculty of Mathematics and Physics, Charles University)02/11/2026, 15:20
Spin-Hall magnetoresistance (SMR) is a magnetoresistive effect observed in bilayers comprising a heavy metal (HM) and a magnetically ordered layer (M). It arises from the interaction between spin-Hall-effect-induced spin accumulation in the HM and the magnetic order in M, mediated by interfacial spin torque and spin transport through magnons or electrons. While SMR has been extensively studied...
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Urs Staub (Center for Photon Science, Paul Scherrer Institute, Villigen, Switzerland)02/11/2026, 16:10
The spin-lattice interaction is of central importance in magnetic solids. Being able to coherently move atoms and by that, directly affecting magnetism is not only interesting for manipulating magnetic properties, but studying it in real time allows to address a completely new view on the interactions itself. Here we use THz pulses to drive ions and fs X-ray pulses from X-Ray...
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Leonie Christine Spitz (PSI - Paul Scherrer Institut)02/11/2026, 16:50
In strongly correlated systems, the coupling between different degrees of freedom opens the prospect to manipulate one by selectively driving another — a strategy made accessible on ultrafast timescales by the advent of intense laser technologies. In quantum magnets, intense THz pulses have been used to drive the lattice far from equilibrium to study magnetoelastic phenomena. However, the...
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243. Coupled atomistic spin-lattice dynamics simulations of ultrafast magnetisation dynamics (Mo4.3)Maryna Pankratova (Uppsala University; University of Skövde, Sweden)02/11/2026, 17:20
Maryna Pankratova$^{*1,2}$, Ivan Miranda$^3$, Anna Delin$^4$, Olle Eriksson$^1$, and Anders Bergman$^1$
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$^1$ Uppsala University, Box 516, SE-75120 Uppsala, Sweden
$^2$ University of Skövde, PO Box 408, 541 28 Skövde, Sweden
$^3$ Linnaeus University, SE-39231 Kalmar, Sweden
$^4$ KTH Royal Institute of Technology, AlbaNova University Center, SE-10691 Stockholm, Sweden
*Corresponding author:... -
Federico J. Furch (Ruhr University Bochum)03/11/2026, 09:10Advanced Laser Science and ApplicationsInvited Talk
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Ondřej Hort (ELI Beamlines, Czech Republic)03/11/2026, 10:00Advanced Laser Science and ApplicationsInvited Talk
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Tamás Nagy (Max Born Institute, Berlin)03/11/2026, 11:10Advanced Laser Science and ApplicationsInvited Talk
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Cord Arnold (Lund University)03/11/2026, 12:00Advanced Laser Science and ApplicationsInvited Talk
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Marcin Sikora (NSRC SOLARIS)04/11/2026, 09:10
The SOLARIS synchrotron in Krakow, Poland, is a third-generation light source operating at 1.5 GeV electron energy. At present, SOLARIS Centre offer access to research instruments at seven beamlines and cryo-electron microscopy laboratory. These instruments provide a state-of-the-art portfolio of spectroscopic and microscopic probes with 200kV accelerated electrons and photons wavelength...
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Natalia Olszowska (URANOS, NSRC SOLARIS, Kraków)04/11/2026, 09:30
High-Resolution, Low-Temperature and Spin-Resolved ARPES
The URANOS (Ultra Resolved ANgular phOtoelectron Spectroscopy) beamline at the SOLARIS National Synchrotron Radiation Centre is dedicated to investigating the electronic and spin properties of solid-state materials using angle and spin-resolved photoemission techniques (Spin-ARPES) at low-temperature capabilities.
The beamline...
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Danylo Babich (Paul Scherrer Institut, Villigen, Switzerland)04/11/2026, 10:00
MAVKA is an X-ray micro-probe beamline for the Ukrainian research community, built within the LEAPS initiative “Light for Ukraine” by PSI, SOLARIS, the National Academy of Sciences of Ukraine and partner institutions on straight section 2 of the 1.5 GeV SOLARIS ring in Kraków. It is designed for 0.5–12 keV and will serve three planned stations that follow the 2023 survey of the Ukrainian user...
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Tomasz Wróbel (NSRC SOLARIS, Kraków (CIRI))04/11/2026, 10:15
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Luc Patthey (PSI)04/11/2026, 11:00
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Eugenio Paris (PSI Center for Photon Science, Paul Scherrer Institute)04/11/2026, 11:40
The spin-orbit exciton (SOE) in iridates is a propagating quasiparticle whose dispersion in a Mott insulator directly reflects the underlying antiferromagnetic (AF) order. The Ruddlesden-Popper iridates Srₙ₊₁IrₙO₃ₙ₊₁ evolve from the Jeff = ½ AF insulators Sr₂IrO₄ and Sr₃Ir₂O₇ to the semimetallic perovskite SrIrO₃, with an insulator-metal transition (IMT) governed by strong spin-orbit coupling,...
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Myron Huzan (MAX IV)04/11/2026, 12:10
Balder, named after the Norse god of light, is a dedicated hard X-ray spectroscopy beamline at the MAX IV laboratory in Sweden, designed for real-time observation of chemical processes. Through the application of X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES), the beamline enables detailed analysis of material structures and electronic states under realistic...
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Cormac McGuinness (European Synchrotron and Free Electron Laser User Organisation (ESUO) / Trinity College Dublin, Ireland)04/11/2026, 12:40
NEPHEWS and beyond: Sustainable user access to external Photon and Neutron Infrastructures
Cormac McGuinness, Astrid Schneidewind, Rosen Georgiev and Piotr Piwowarczyck
The NEPHEWS project currently provides Trans-National Access (TNA) funding for users from across all of Europe to perform experiments at the majority of synchrotron, FEL and neutron research infrastructures (RI) of the...
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Igor Beinik (MAX IV, Lund University)04/11/2026, 12:55
Soft X-ray microscopy combines high spatial resolution with sensitivity to the chemical composition, electronic structure, and magnetic properties of materials. By tuning the photon energy across characteristic absorption edges, it becomes possible to visualize the spatial distribution of different elements and their chemical states, providing valuable insights into the structure and...
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Volodymyr Bezguba (Kyiv Academic University)04/11/2026, 14:00
Quantum materials are a broad class of solids whose properties emerge from quantum-mechanical and collective electronic effects that have no classical counterpart, superconductivity being one of the best-known examples. Non-trivial band topology gives rise to further exotic phenomena, such as robust spin-polarized surface states, making these materials highly attractive for spintronics and...
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Tetiana Zakusylo (Johannes Kepler University Linz)04/11/2026, 14:30
Ferroelectric topological materials combining ferroelectricity and non-trivial band topology open promising frontiers in topological matter by introducing ferroelectric-driven inversion symmetry breaking in the system [1-3]. In particular, ferroelectricity in topological crystalline insulator has been predicted to support the emergence of inversion breaking Weyl semimetal phase, which so far...
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Larysa Khomenkova (V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, 41 Pr. Nauky, Kyiv 03028, Ukraine)04/11/2026, 14:45
Zirconia-based materials are widely used in optical, energy-related, and functional ceramic applications owing to their excellent mechanical, thermal, dielectric, and chemical stability. Their properties can be tailored through stabilization with aliovalent dopants, including luminescent rare-earth (Eu, Yb, Gd) and transition-metal (Mn, Cu) ions. Such modifications affect phase composition,...
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Astrid Schneidewind (Jülich Centre for Neutron Science (JCNS), Forschungszentrum Jülich)04/11/2026, 15:00
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Anatoliy Senyshyn (Technical University of Munich, Heinz Maier-Leibnitz Zentrum (MLZ))04/11/2026, 15:10
In the current contribution the principles of free neutron generations will be introduced along with the basic properties of free neutrons relevant for scattering experiments. Different types of neutron interaction with matter, its parametrisation and features will be discussed in brief as a base for various neutron related experimental techniques.
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Oleksandr Prokhnenko (Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany)04/11/2026, 15:35
This talk will introduce the basic principles of neutron diffraction and how it can be used to investigate structure and properties of modern materials. It will provide an overview of the experimental setups, type of information that can be obtained, and make a comparison with x-ray scattering techniques. The talk is aimed at beginners with no prior experience in neutron diffraction and will...
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Oleksandr Tomchuk (ISIS Neutron and Muon Source, STFC Rutherford Appleton Laboratory)04/11/2026, 15:50
Small-angle neutron scattering (SANS) is a versatile technique for investigating structural features and spatial correlations in materials over length scales typically ranging from approximately 1 to 100 nm, with the accessible range depending on the instrument configuration. By probing variations in neutron scattering length density, SANS provides insight into nanoscale structures in a wide...
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Yehor Kosiachkin (DMSC ESS)04/11/2026, 16:05
Neutron Reflectometry (NR) is a technique to study interfaces and surfaces along normal direction to the sample surface. This talk covers technique overview followed by use-case examples from different scientific fields.
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Oleg Petrenko (Institut Laue-Langevin)04/11/2026, 16:20
Presentation aims to give a very brief introduction into neutron spectroscopy. Inelastic neutron scattering probes the dynamics of materials by measuring the energy exchanged between neutrons and a sample during scattering. This allows access to a wide range of phenomena, including atomic diffusion, molecular rotations and vibrations, phonons, magnons, crystal-field excitations, and other...
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Vasyl Ryukhtin (Nuclear Physics Institute CAS)04/11/2026, 16:35
Neutron imaging using thermal neutrons is well suited for the investigation of, for example, damaged concrete, lithium batteries, fuel elements for fusion reactors, munition, cultural heritage objects, and fossils. A particularly powerful application of neutron beams lies in biological research, such as monitoring water transport in plants or performing in‑vivo observations of bee larva...
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Anastasiia Sakhatska (ETH Zurich)04/11/2026, 16:50
Fast-neutron imaging offers unique capabilities for the nondestructive investigation of dense and compositionally heterogeneous objects, particularly those containing both light and heavy elements. However, its wider application is limited by the efficiency of existing detection technologies. Conventional scintillator screens typically combine hydrogen-rich polypropylene (PP) with luminescent...
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Ivan Guk (National Science Center “Kharkov Institute of Physics and Technology”)04/11/2026, 17:05
As can be seen from an overview of the primary, high-intensity neutron sources of various types [1], their characteristics enable research across a wide range of tasks in chemistry, biology, medicine, and solid-state physics. Unfortunately, Ukraine currently lacks neutron sources capable of supporting research in these fields at a sufficiently high level, or of facilitating the training and...
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Andrii Zelinsky (National Science Center "Kharkiv Institute of Physics and Technology")04/11/2026, 17:20
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Mindaugas Gedvilas (Department of Laser Technologies (LTS), Center for Physical Sciences and Technology (FTMC), Savanoriu Ave. 231, 02300 Vilnius, Lithuania)05/11/2026, 09:05Laser processing of materials for advanced optoelectronic applicationsInvited Talk
Ultrashort pulse laser ablation has become an important technology for precision micro- and nanoprocessing of metals, enabling high spatial resolution, minimal thermal damage, and precise control over surface morphology. However, achieving high processing efficiency while maintaining excellent surface quality remains a major challenge, particularly in industrial applications where high...
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Amit Verma (Department of Electrical Engineering; Adjunct Faculty, MSP, IIT Kanpur)05/11/2026, 09:35Laser processing of materials for advanced optoelectronic applicationsInvited Talk
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Vladyslav Dzhahan (Faculty of Physics of Taras Shevchenko National University of Kyiv)05/11/2026, 10:05Sustainable Materials and Technologies for Optoelectronics and SensorsOral
The development of flexible electronics and biomedical sensors requires new materials that combine electrical conductivity, mechanical flexibility, and ease of fabrication. Among the most promising candidates are graphene and its chemical derivatives – graphene oxide (GO) and reduced graphene oxide (rGO). Graphene exhibits exceptionally high carrier mobility and mechanical strength; however,...
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Danylo Havryliuk (Faculty of Information Security and Electronic Communications, Zaporizhzhia Polytechnic National University)05/11/2026, 10:25Laser processing of materials for advanced optoelectronic applicationsOral
The electrical conductivity and optical properties of graphene oxide are determined by and can be tuned through its degree of reduction, while residual oxygen-containing groups serve as active sites for functionalization and chemical sensing. Reduction is typically achieved via chemical or thermal methods. Laser reduction, by contrast, is a single-step, localized process that requires neither...
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Stanislav Serhiichuk (Lashkaryov Institute of Semiconductor Physics)05/11/2026, 10:40Laser processing of materials for advanced optoelectronic applicationsOral
Controlling laser-matter interaction is a fundamental prerequisite for the maskless patterning of advanced materials, thin films, and functional optoelectronic architectures. Because modern research frequently relies on high-cost specialized lithographic equipment, industrial laser engravers and markers operating across diverse spectral and temporal regimes present a highly accessible and...
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Enrico Di Russo (Department of Physics and Astronomy, University of Padova)05/11/2026, 11:15Laser processing of materials for advanced optoelectronic applicationsInvited Talk
The precise, localized control of semiconductor properties is a central challenge in the development of next-generation nanoelectronics, optoelectronics, and photonic devices. Among the available processing techniques, nanosecond pulsed laser processing has emerged as a uniquely powerful tool, offering spatial and temporal confinement of energy deposition, compatibility with existing Si CMOS...
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Prof. Volodymyr Yukhymchuk (V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine)05/11/2026, 11:45Laser processing of materials for advanced optoelectronic applicationsOral
GeSn alloy thin films grown on silicon substrates attract significant attention in infrared optoelectronics. The primary advantage of GeSn is transforming indirect-bandgap germanium into a direct-bandgap semiconductor through substitutional incorporation of 8–10 at.% tin atoms into the Ge lattice. Since the equilibrium solubility of Sn in Ge at room temperature does not exceed 1 at.%,...
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Ievgen Beliak (Institute for Information Recording of National Academy of Sciences of Ukraine)05/11/2026, 12:00Laser processing of materials for advanced optoelectronic applicationsOral
Direct Laser Writing (DLW) enables the fabrication of micro- and submicron structures with predefined geometries directly on the surface of photosensitive and functional materials. At the same time, variations in laser irradiation parameters, non-uniformity of thin-film properties, and instability of individual fabrication stages can result in local defects that affect the geometrical and...
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Oleksii Manko (Institute for Information Recording of the National Academy of Sciences of Ukraine)05/11/2026, 12:15Laser processing of materials for advanced optoelectronic applicationsOral
Direct Laser Writing (DLW) is the basis of maskless photolithography for the fabrication of high-resolution diffractive optical elements (DOEs) and coded structures for long-term storage media. Traditional DOE design relies on analytical calculations, electromagnetic modeling, and iterative parameter optimization. For free-form geometries, the configuration space grows rapidly, which leads to...
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Dr Illia Guralskyi (Taras Shevchenko National University of Kyiv)05/11/2026, 13:35Sustainable Materials and Technologies for Optoelectronics and SensorsInvited Talk
Hybrid organic-inorganic metal halide perovskites are promising semiconductors for photovoltaic and light-emitting applications owing to their compositional flexibility and tunable optoelectronic properties. In this presentation, aziridinium-based three-dimensional perovskites are discussed as a versatile platform for band-gap engineering through halide substitution and B-site metal...
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Valerii Sirenko (Taras Shevchenko National University of Kyiv)05/11/2026, 14:05Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Hybrid organic–inorganic perovskites offer versatile platforms for tuning light emission through their chemical composition and structural dimensionality. However, achieving tunable broadband emission in single-phase lead iodide systems remains challenging. In this work, we present the synthesis, structural characterization, and optical properties of a two-dimensional hybrid perovskite,...
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Dr Hanna Petrosova (Taras Shevchenko National University of Kyiv)05/11/2026, 14:20Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Compositional engineering through metal mixing is an important strategy for tailoring the structural and functional properties of hybrid metal halide perovskites.[1] While extensive research has focused on mixing organic cations at the A-site and halide anions at the X-site,[2] the effects of B-site mixing on phase stability and structural transitions remain less explored. In this work, we...
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Dmytro Haleliuk (Taras Shevchenko National University of Kyiv)05/11/2026, 14:35Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Hybrid organic-inorganic perovskites (HOIPs) have attracted considerable attention in recent years. These materials are characterized by the general formula ABX3 (where A is an organic cation, B is a metal cation, and X is a halide anion) and exhibit unique semiconducting properties. Driven by extensive research, these compounds have been successfully integrated as active layers in...
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Olesia Kucheriv (Taras Shevchenko National University of Kyiv)05/11/2026, 14:50Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Ten new hybrid coordination compounds containing the octahedral tris(2,2′-bipyridine)ruthenium(II) cation and structurally diverse metal chloride anions were synthesized and characterized by single-crystal X-ray diffraction. The inorganic components exhibit remarkable structural diversity; the formation of discrete tetrahedral anions [CoCl4]2–,...
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Oleg Dimitriev (V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, prospect Nauki 41, Kyiv 03028, Ukraine)05/11/2026, 15:05Sustainable Materials and Technologies for Optoelectronics and SensorsInvited Talk
Heat and thermal radiation are large components of energy provided by direct sun radiation (where infrared constitutes a significant portion), terrestrial radiation, byproducts of industrial and agricultural activity, physical, chemical and biological processes in nature as well. However, a subsequent conversion of thermal energy into other useful forms such as electricity or mechanical work...
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Galina Gurieva (Helmholtz-Zentrum Berlin)05/11/2026, 15:55Sustainable Materials and Technologies for Optoelectronics and SensorsInvited Talk
The need of handling eco-friendly and cheap compound semiconductors in thin film photovoltaics (PV) has constantly pushed the research towards more environmentally friendly materials, such as Kesterite-type compound semiconductors Cu2ZnSnS4 (CZTS), Cu2ZnSnSe4 (CZTSe) and Cu2ZnSn(S,Se)4 (CZTSSe). They present the only critical raw material (CRM) free thin film PV technology with tunable band...
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Oleksandr Stroyuk (FZ Jülich, HI ERN (IMD-3))05/11/2026, 16:25Sustainable Materials and Technologies for Optoelectronics and SensorsInvited Talk
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Oleksandra Ivakhno-Tsehelnyk (Semiconductor Physics & Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, 09107 Chemnitz, Germany.)05/11/2026, 16:55Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Quaternary chalcogenides based on Cu₂ZnSnS₄ (CZTS) are attracting attention as earth-abundant, low-cost semiconductor materials for thin-film photovoltaics (PV) and thermoelectric (TE) applications. Substituting Zn with transition metals such as Ni, Fe, and Co offers opportunities to modify cation distribution, defect structure and electronic properties.
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The “green” aqueous synthesis protocol... -
Tomash Sabov (V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine)05/11/2026, 17:10Sustainable Materials and Technologies for Optoelectronics and SensorsOral
Vanadium oxide (VOX) thin films of different phase composition and stoichiometry (1.5< x< 2.5) are widely used in nano- and micro-electronics, sensors, applied optics, and energy-saving technologies. There are about 20 phases of vanadium-oxygen system including main (VO, V2O3, V3O5, VO2, V2O5) and defective (VnO2n-1, VnO2n+1, etc) phases. Of particular interest are the VO2 phase, which have...
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Dovile Cibiraite-Lukenskiene (Center for Physical Sciences and Technology (FTMC), Vilnius)05/11/2026, 17:25Sustainable Materials and Technologies for Optoelectronics and SensorsInvited Talk
The nominal cut-off frequency of a semiconductor transistor does not necessarily mark the end of its potential for radio-frequency and terahertz applications. This talk explores the physics, development, and performance of antenna-coupled field-effect transistor detectors (TeraFETs) fabricated in CMOS technology, highlighting how nonlinear effects enable detection far beyond conventional...
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Liudmyla Derzhypolska (Institute of Physics, NAS of Ukraine)06/11/2026, 09:10Optics and High Technology Material ScienceInvited Talk
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Artem Podshebiakin (Taras Shevchenko National University of Kyiv)06/11/2026, 09:40Optics and High Technology Material ScienceOral
Integrated photonics needs film lasers as thin as possible, yet an asymmetric planar waveguide guides light only above the cutoff thickness $h_c$ of its fundamental mode. We examine lasing in the critical regime, $h\approx h_c$, where the TE$_0$ effective index $N$ approaches the substrate index $n_s$, and show that Lummer–Gehrcke (LG) modes [1] are its sub-cutoff special case.
The samples...
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Andrii Lopatynskyi (V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine)06/11/2026, 09:55Optics and High Technology Material ScienceOral
Silver nanoparticles (AgNPs) coated with stimuli-responsive polymers are promising hybrid nanomaterials for plasmonic and sensing applications [1]. Polymer shells provide steric stabilization and allow the nanoparticle surface to be functionalized [2]. In this work, AgNPs coated with poly(N-isopropylacrylamide) (pNIPAM) were synthesized by a photochemically assisted method. The order in which...
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Mariia Pashchenko (Institute of Physics of the Czech Academy of Sciences (FZU), Prague)06/11/2026, 10:10Optics and High Technology Material ScienceInvited Talk
Magneto-optical effects, arising from the interaction of polarized light with exchange splitting and spin-orbit coupling, have long been powerful tools for investigating the electronic structure and magnetic domains of magnetically ordered materials. In this lecture, we will revisit the fundamental principles of magneto-optical phenomena and review their main types, including transmission...
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Dr Kateryna Terebilenko (Taras Shevchenko National University of Kyiv)06/11/2026, 11:00Optics and High Technology Material ScienceInvited Talk
Science and innovation are essential drivers of technological development, national resilience, and post-war recovery. In this context, the chemistry of melts offers significant opportunities for developing advanced functional materials while improving the efficiency of technological processes and the sustainable use of limited resources. This contribution explores fundamental and applied...
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Younes Elalaoui (Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, B.P.7955, Morocco)06/11/2026, 11:30Optics and High Technology Material ScienceOral
Oxide perovskites have attracted increasing interest for photovoltaic applications due to their structural stability, tunable electronic properties, and potential for optoelectronic devices. Among these materials, barium stannate (BaSnO₃) exhibits promising characteristics, including a cubic crystal structure and high electron mobility. However, its wide band gap limits its absorption of the...
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Dr Binayak Mukherjee (Theoretical Materials Physics, Q-MAT, Université de Liège, B-4000 Sart-Tilman, Belgium)06/11/2026, 11:45Optics and High Technology Material ScienceOral
Second-principles lattice models have recently enabled large-scale simulations of complex polar textures in ferroelectric perovskite oxides, including vortices, skyrmions, merons and related inhomogeneous domain structures [1-3]. In displacive compounds, it is known that extra charge can induce local tuning of displacive motions, being for instance at the origin of anti-distortive polarons...
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Saicharen Lakshmanan (Sri Sathya Sai Institute of Higher Learning)06/11/2026, 12:00Optics and High Technology Material ScienceOral
Acceptor doping is the standard route to raising the mechanical quality factor $Q_m$ of lead-free piezoceramics for high-power and resonant applications, but in solid-state processed ceramics the same additive also changes sintering behaviour, so gains in $Q_m$ are often confounded with changes in porosity. We separate these two effects in BNT-BT-KNN ceramics modified with 0 to 0.5 wt% MgO and...
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Rostyslav Vazhnenko (Taras Shevchenko National University of Kyiv, Department of Physics)06/11/2026, 12:15Optics and High Technology Material ScienceOral
Silicon carbide (SiC) ceramics are widely recognized for their high hardness, excellent thermal stability, and chemical inertness. However, the inherent brittleness of pure (SiC) matrix remains a primary limitation for demanding structural and armour applications. In this study, the effect of graphite inclusions on the mechanical performance and sintering behavior of SiC-based ceramics was...
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Prof. Oleksandr Zaichenko (Lviv Polytechnic National University)06/11/2026, 12:30Optics and High Technology Material ScienceOral
The increasing use of high-frequency electromagnetic technologies, including advanced radar systems, millimetre-wave communications, and emerging sub-terahertz applications, creates a growing demand for lightweight, flexible, and efficient electromagnetic shielding materials. Conventional conductive shields predominantly reflect incident radiation, whereas practical applications increasingly...
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Polina Shamrovska (TU Chemnitz)06/11/2026, 14:00Optics and High Technology Material ScienceOral
β-Ga2O3 thin films have gained significant research interest due to their wide bandgap, high thermal stability, and high breakdown voltage, making them suitable for e.g. UV photodetectors. In this work, undoped and Sn-doped β-Ga2O3 thin films were deposited on c-plane sapphire substrates via ultrasonic spray pyrolysis extending our previous studies based on conventional spray coating. The use...
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Eugene Bortchagovsky (V. Lashkaryov Institute of Semiconductor Physics of NAS of Ukraine, Kyiv, Ukraine & Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, Germany)06/11/2026, 14:15Optics and High Technology Material ScienceOral
We demonstrate that spatial dispersion plays an important role in optical properties of layers of plasmonic (interacting) nanoparticles. It results particularly in the dependence of the effective optical properties of such structures on the angle of incidence of the exciting light as well as on the orientation of the lattice in relation to the plane of incidence even though formally such...
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Vladyslav Tsehelnyi (Université de Lorraine, CNRS, LEMTA, Nancy F-54000, France)06/11/2026, 14:30Optics and High Technology Material ScienceOral
Thermal management plays a crucial role in improving the efficiency of next-generation electronic devices, renewable energy systems, and building thermal regulation. Among thermal management technologies, phase-change materials (PCMs) have attracted considerable attention due to their ability to store and release large amounts of latent heat during nearly isothermal phase transitions [1]....
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Saicharen Lakshmanan (Sri Sathya Sai Institute of Higher Learning)06/11/2026, 14:45
Piezocatalysis with ultrasonically driven ferroelectric powders is usually rationalised with the longitudinal coefficient $d_{33}$, even though the particles are unpoled and cavitation loading is close to hydrostatic. We build an open-source finite element framework (FEniCSx) for the coupled electromechanical problem and use it to ask which material property actually controls the surface...
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Ayush Kumar Samal (Sri Sathya Sai Institute of Higher Learning)06/11/2026, 14:49
Ta-modified potassium sodium niobate (KNN) ceramics are promising lead-free piezoelectric materials for sensing applications. In this study, the nominal composition $(\mathrm{K}_{0.47}\mathrm{Na}_{0.545})(\mathrm{Nb}_{0.55}\mathrm{Ta}_{0.45})\mathrm{O}_3$, reported in the literature to exhibit enhanced piezoelectric performance through polymorphic phase-transition (PPT) tuning, was...
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208. Sintering temperature influence on phase stability of scandium-stabilized ZrO₂ ceramics (Fr4.3)Vita Prosolenko (Mykola Gogol Nizhyn State University)06/11/2026, 14:53
In this work the structural evolution of scandium-stabilized zirconia ceramics co-doped with cerium and gadolinium as a function of sintering temperature in the range of 1100–1500 °C was investigated. Two compositions were studied: 1Ce10ScSZ (1 mol.% CeO₂ – 10 mol.% Sc₂O₃ – 89 mol.% ZrO₂) and 0.5Ce0.5Gd10ScSZ (0.5 mol.% CeO₂ – 0.5 mol.% Gd₂O₃ – 10 mol.% Sc₂O₃ – 89 mol.% ZrO₂). X-ray...
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Viktor Bardakov (Mykola Gogol Nizhyn State University)06/11/2026, 14:57
Mg$_x$Zn$_{1-x}$O solid solutions make it possible to tune the band gap of ZnO smoothly into the ultraviolet region. However, in ceramic materials the hexagonal wurtzite and cubic phases coexist over a wide composition range, so the nominal composition does not reflect the actual phase state that determines the optical and electrical properties. Infrared (IR) reflectance spectroscopy is...
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Oleksandr Melnichuk (Mykola Gogol Nizhyn State University)06/11/2026, 15:01
The influence of the electrical conductivity of the initial ZnO powder on the structural, optical properties and chemical composition of MgxZn1-xO ceramics was investigated. Ceramic samples containing 10-30 mol.% Mg were prepared from ZnO and MgO powders and sintered in air at 1050 °C for 3 h. Two series of samples were prepared using ZnO powders with different electrical conductivities....
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Mr Oleksii Sakhniuk (Nizhyn Mykola Gogol State University, Nizhyn, Ukraine)06/11/2026, 15:05
Attenuated total reflection (ATR) is a convenient way to probe thin films of wide-bandgap semiconductors in the far infrared. For the ZnO/6H-SiC system, whose reststrahlen bands lie at about 378–590 and 788–970 $\mathrm{cm}^{-1}$, the prism, incidence angle and air gap determine which bands can be excited. We simulate the Otto configuration (prism / air gap / ZnO film / 6H-SiC substrate),...
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Dr Kateryna Terebilenko (Taras Shevchenko National University of Kyiv)06/11/2026, 15:09
Amorphous oxide materials are of considerable interest for optical applications because of their isotropic nature, which ensures uniform optical properties regardless of the direction of light propagation. In contrast to crystalline materials, glasses do not exhibit long-range structural order or intrinsic optical anisotropy, making them promising candidates for functional optical components...
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Vasyl Cherevyshnuy (Taras Shevchenko National University of Kyiv)06/11/2026, 15:13
Porous materials with a large specific surface area are used in batteries, supercapacitors, sensors, nanogenerators, and drug delivery systems. Porous (foamed) glass and glass-ceramics also attract attention because they can be produced from industrial waste. The mechanical and thermal properties of such systems are well studied. Their optical and electrophysical properties remain largely...
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Dr Vitalii Chornii (1) Taras Shevchenko National University of Kyiv; 2) National University of Life and Environmental Sciences of Ukraine)06/11/2026, 15:17
Gelatin is a natural polymer widely used in the food, cosmetics, and biomedical industries. In particular, gelatin hydrogels are used as dressings for wound management and tissue regeneration. Macroporous gelatin-based hybrid hydrogels also have potential applications in regenerative medicine, particularly in bone and cartilage repair. However, gelatin has several limitations that restrict its...
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Mykola Melnichenko (Taras Shevchenko National University of Kyiv)06/11/2026, 15:21
The use of mechanochemical activation of metal powders, as well as their mixtures, in planetary mills opens up broad prospects for the creation of new nanocomposite materials. A characteristic feature of this type of activation is that, after it is used to process mixtures, the particle morphology, size, and phase composition change. Ti–Cu nanocrystalline materials, synthesized by mechanical...
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R Karapinar (Mehmet Akif Ersoy University, Burdur, Türkiye)06/11/2026, 15:25
Applying nanotechnology to liquid crystalline materials is a promising research area. The nanoparticles can produce interesting optical properties in the liquid crystals. This effect results in lower operating voltages for liquid crystal devices. In this study, we discuss the presence of nanoparticles in a nematic liquid crystal mixture and the determination of the order parameter in pure and...
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Mr Zakhar Baranchykov (Taras Shevchenko National University of Kyiv)06/11/2026, 15:29
Poly(vinylidene fluoride-co-trifluoroethylene), P(VDF-TrFE), is a ferroelectric polymer of interest for flexible electronics, sensors, and energy-harvesting devices. Its optical response depends on both crystalline structure and chemical composition, making spectroscopy a potentially useful tool for identifying phase composition and fluorination-related structural changes. However, the...
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Dmytro Zaporoshchenko (Taras Shevchenko National University of Kyiv, Kyiv, Ukraine)06/11/2026, 15:33
Poly(vinylidene fluoride-co-trifluoroethylene), P(VDF-TrFE), is a ferroelectric polymer whose vibrational spectra depend on crystalline structure and chemical composition. Interpreting these spectra requires distinguishing phase-dependent features from changes associated with TrFE content. This study compares density functional theory (DFT) predictions with published infrared and Raman...
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Danylo Kreiman (Taras Shevchenko National University of Kyiv)06/11/2026, 15:37
Hybrid metal halides have attracted considerable attention as functional materials owing to their structural diversity and tunable optical and electronic properties. In particular, hybrid perovskites are promising candidates for applications in optoelectronics, photodetection, and light-emitting devices. However, the widespread use of lead-based perovskites raises concerns regarding the...
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Denys Orlov (Taras Shevchenko National University of Kyiv)06/11/2026, 15:41
Lead-free double perovskites $\mathrm{Cs_2NaInCl_6}$ (CNIC) and its Ag-alloyed derivatives $\mathrm{Cs}_2\mathrm{Ag}_x\mathrm{Na}_{1-x}\mathrm{InCl}_6$ (CANIC) are promising down-converting phosphors for solar-blind UV detection, where emission must be excited near the fundamental absorption edge. Tuning them requires an atomic-level picture of how Ag and dopants reshape the electronic...
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Nazarii Tkach (Taras Shevchenko National University of Kyiv, Faculty of Physics)06/11/2026, 15:45
MXenes-two-dimensional transition metal carbides-and their precursor MAX phases are considered promising agents for photothermal and photodynamic therapy owing to their absorption in the near-IR region, where biological tissues are most transparent. However, the factors governing the balance between photothermal and photodynamic excitation relaxation channels in MXenes remain poorly...
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Nazarii Tkach (Taras Shevchenko National University of Kyiv, Faculty of Physics)06/11/2026, 15:49
Tryptanthrin (Try) is a natural indoloquinazoline alkaloid with a broad spectrum of biological activity that is considered a potential photosensitizer for photodynamic therapy. However, the generation of singlet oxygen ¹O₂ by Try in ethanol is inefficient. One way to enhance the photosensitizing ability of organic dyes is to combine them with two-dimensional transition metal dichalcogenides....
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Andrii Pocherpailo (Taras Shevchenko National University of Kyiv)06/11/2026, 15:53
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{\large\bfseries Silicon incorporation and dislocation-related... -
Yevhen Melezhyk (V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine)06/11/2026, 15:57
Phase-change materials (PCMs) and PCM-based metamaterials represent an emerging field of research. These materials can change their infrared emissivity under external stimuli such as applied electric current, mechanical strain, or optical laser pulses. Owing to this ability, they find applications in various industries, from novel building materials and fabrics to drug delivery, solar panel...
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Vitalii Bortnik (National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”)06/11/2026, 16:01
Frame-based cameras read out all pixels at a fixed rate, whether or not the scene changes. In dynamic scenes, fast objects blur, dynamic range is limited, latency is bounded by the frame period, and static regions are transmitted redundantly. In event-based cameras, each pixel responds independently to log-brightness changes and asynchronously emits an event carrying its coordinates, polarity...
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Danylo Morozov (Taras Shevchenko National University of Kyiv)06/11/2026, 16:05
Cellulose is an abundant renewable polymer with potential applications in sustainable packaging, coatings and functional composites. Its hydroxyl groups enable hydrogen bonding and chemical modification, providing opportunities to tailor its interactions with other components. Methylcellulose, a cellulose derivative obtained by partial methyl substitution, is also used as a film-forming...
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Serhii Levytskyi (V.E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine)06/11/2026, 16:30
Single-crystal semi-insulating CdTe and Cd1-xZnxTe (x=0.1) materials are highly promising for high-efficiency X- and γ-ray detectors operating at room temperature. Utilizing diode-type potential barriers (p-n junctions or Schottky barriers) significantly reduces dark current and noise levels compared to homogeneous detectors, which is critical for photon-counting and spectrometry modes....
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Oleh Bozhko (Taras Shevchenko National University of Kyiv, Kyiv, Ukraine)06/11/2026, 16:34
Authors: Olegh Bozhko, Oleksandr Datsenko, Serhiy Kondratenko
Affiliation: Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv 01601, Ukraine
Contribution type: PosterAbstract
PEDOT:PSS/Si heterostructures are promising for silicon-based photovoltaics. The transparent polymer behaves as a $p$-type semiconductor and forms a $p$--$n$ heterojunction with $n$-Si, which...
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Taras Veremeichyk (Taras Shevchenko National University of Kyiv)06/11/2026, 16:38
Single-layer (porosity 64 % and 48 %) and double-layer porous silicon (PS) samples about 5 µm thick, formed by electrochemical etching of p$^+$-Si(100) at 200 and 50 mA/cm$^2$, were studied before and after thermal annealing in air. Spectroscopic ellipsometry Ψ(λ), Δ(λ) spectra were analysed in the transparent near-infrared region using a sequence of models: a homogeneous Cauchy layer, two-...
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Solmaz Salary (University of Tabriz, Iran)06/11/2026, 16:42
Graphene-based photonic structures make it possible to control terahertz waves with an electric voltage. In this work, we study a symmetric one-dimensional photonic microcavity made of two mirror-image Bragg reflectors, $\mathrm{PC}_{1} = (AB)^{5}$ and $\mathrm{PC}_{2} = (BA)^{5}$, with a stack of $s$ graphene layers at their junction. Layer A has a refractive index $n_{A} = 2.35 + 0.0014i$...
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Andrii Shekera (V.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine)06/11/2026, 16:46
Sub-Terahertz (sub-THz) radiation is one of the candidate bandwidths for 6G and future wireless networks due to its ability to deliver much higher data rates and greater capacity than lower-frequency bands. However, its shorter wavelength leads to significant free-space path loss (FSPL) in line-of-sight (LOS) conditions for a given link distance and fixed antenna gains. In non-line-of-sight...
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Dmytro Ivanskyi (Yuriy Fedkovych Chernivtsi National University)06/11/2026, 16:50
In recent decades, considerable attention has been paid to the study of structured light with transverse angular momentum. For example, transverse spin angular momentum arises in tightly focused circularly polarized Gaussian beams and evanescent fields. The concept of the formation of transverse orbital angular momentum (OAM) is gaining relevance, which consist in development of spatiotemporal...
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Dmytro Manko (Institute for Information Recording, NASU)06/11/2026, 16:54
The development of micro- and nanooptics requires improved methods for forming diffractive optical elements with linear dimensions comparable to or significantly smaller than the wavelength. The resolution of traditional optical lithography systems is limited by the diffraction limit.
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It is shown that the diffraction limitation can be overcome by using a nonlinear exposure characteristic of... -
Sergii Mamykin (V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, Kyiv)06/11/2026, 16:58
Thin structures Ag–thin film of chalcogenide glasses (ChG) have attracted the attention of researchers for 60 years, ever since the effect of light stimulated diffusion of silver into ChG was discovered by M. T. Kostyshyn, K. V. Michailovska and P. F. Romanenko [1]. This is due to the rich physicochemical nature of the phenomena occurring within these structures, resulting in a wide variety of...
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Viktor Shyshkin (National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute")06/11/2026, 17:02
Precision diffuse optical emitters (PDOEs) based on integrating spheres are used for radiometric calibration of digital cameras, optical sensors, and optoelectronic systems, in particular for measuring response linearity and spatial nonuniformity and for determining correction parameters of focal plane arrays. In modern PDOEs, the integrating sphere mixes radiation spatially, while high-power...
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Praskoviya Boltovets (V.E. Lashkaryov Institute of Semiconductor Physics, NASU, Ukraine)06/11/2026, 17:06
The provision of fresh foodstuffs in extreme conditions is almost entirely dependent on the state of artificial lighting technology for indoor farming. The primary technological challenges associated with this approach are twofold: the substantial energy consumption and the paucity of information regarding optimal lighting procedures to maximize crop yields. This underscores the clear...
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Oksana Futorna (Educational and Scientific Institute of High Technologies, Taras Shevchenko National University of Kyiv; M.G. Kholodny Institute of Botany, NAS of Ukraine)06/11/2026, 17:10
The digitisation of botanical collections and modern optical image analysis expand the opportunities for quantitative assessment of plant morphological traits. Standardising optical measurements and processing parameters reduces observer subjectivity and improves data comparability. Open access to high-resolution images, metadata and algorithms supports reproducible analysis and reuse of...
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Diana Hurova (B. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine)06/11/2026, 17:14
Chitosan is a semicrystalline natural polymer whose structural organization is strongly influenced by intermolecular hydrogen bonding, hydration, and preparation conditions [1, 2]. Incorporation of carbon-based nanomaterials, particularly thermally reduced graphene oxide (trGO), can substantially modify the molecular packing and crystalline ordering of the polymer matrix. In this work, the...
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Tymur Isokov (Institute of Physics, NAS of Ukraine, Kyiv, Ukraine)06/11/2026, 17:18
Quantitative analysis of blood plasma metabolites is an important tool for assessing metabolic alterations associated with various pathological conditions [1]. In particular, the analysis of free amino acids can provide valuable information for the diagnosis and monitoring of cancer [2]. However, comprehensive amino acid profiling typically requires sophisticated analytical instrumentation and...
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Andrey Sarikov (V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41 Nauky Avenue, 03028 Kyiv, Ukraine)06/11/2026, 17:22
Gallium oxide (Ga₂O₃) has emerged as a promising ultra-wide bandgap semiconductor with potential applications in power electronics, solar-blind deep-ultraviolet optoelectronics, gas sensors, and X-ray detectors. Depending on the polymorph (α, β, γ, and κ), it features a bandgap of 4.4 - 5.6 eV, a high breakdown electric field of ~8 MV/cm, and a figure of merit that overcomes that of SiC and...
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