TY - JOUR AU - Vass, Dávid Imre AU - Tóth, Emese AU - Szenes, András László AU - Bánhelyi, Balázs AU - Papp, István AU - Biró, Tamás Sándor AU - László, Pál Csernai AU - Norbert, Kroó AU - Csete, Mária TI - Plasmonic nanoprism distributions to promote enhanced and uniform energy deposition in passive and active targets JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 15 PY - 2025 IS - 23 PG - 17 SN - 2079-4991 DO - 10.3390/nano15231801 UR - https://m2.mtmt.hu/api/publication/34985869 ID - 34985869 AB - Passive and active targets, both implanted with gold nanoprisms, were designed to achieve enhanced, uniform power absorption during two-sided illumination with short laser pulses. The capabilities of uniform, single-peaked Gaussian and adjusted nanoresonator number density distributions were compared. The average local E-field inside the gain medium and at the nanoprism surface was mapped as a function of the pump E-field strength and dye concentration, and the optimal parameters were selected based on the achievable local E-field. A comparative study was performed on passive and active targets to determine the most favorable distribution type and to consider the advantages of dye doping. The adjusted distribution is proposed for both passive and active targets. Dye doping is advantageous in all distributions as it results in decreasing the minimal standard deviation of the near-field enhancement (NFE), the delay of the minimal standard deviation in the power loss and deposited energy, and the standard deviation of the NFE, while increasing the FOM of the NFE in the uniform and adjusted distributions. Dye doping allows for decreasing the delay of the minimal standard deviation in the NFE, increasing the mean NFE, and decreasing the standard deviation of the power loss and deposited energy in the uniform, Gaussian, and adjusted distribution, respectively. LA - English DB - MTMT ER - TY - JOUR AU - Cirunay, Michelle AU - Ódor, Géza AU - Papp, István AU - Deco, Gustavo TI - Scale-free behavior of weight distributions of connectomes JF - PHYSICAL REVIEW RESEARCH J2 - PRRESEARCH VL - 7 PY - 2025 IS - 1 PG - 16 SN - 2643-1564 DO - 10.1103/PhysRevResearch.7.013134 UR - https://m2.mtmt.hu/api/publication/35745254 ID - 35745254 AB - To determine the precise link between anatomical structure and function, brain studies primarily concentrate on the anatomical wiring of the brain and its topological properties. In this work, we investigate the weighted degree and connection length distributions of the KKI-113 and KKI-18 human connectomes, the fruit fly, and the mouse retina. We find that the node strength (weighted degree) distribution behavior differs depending on the considered scale. On the global scale, the distributions are found to follow a power-law behavior, with a roughly universal exponent close to 3. However, this behavior breaks at the local scale as the node strength distributions of the KKI-18 follow a stretched exponential, and the fly and mouse retina follow the log-normal distribution, respectively, which are indicative of underlying random multiplicative processes and underpins nonlocality of learning in a brain close to the critical state. However, for the case of the KKI-113 and the H01 human ( 1 mm 3 ) datasets, the local weighted degree distributions follow an exponentially truncated power law, which may hint at the fact that the critical learning mechanism may have manifested at the node level too. LA - English DB - MTMT ER - TY - JOUR AU - Hartmann, Bálint AU - Ódor, Géza AU - Benedek, Kristóf AU - Papp, István TI - Studying power-grid synchronization with incremental refinement of model heterogeneity JF - CHAOS J2 - CHAOS VL - 35 PY - 2025 IS - 1 PG - 9 SN - 1054-1500 DO - 10.1063/5.0237050 UR - https://m2.mtmt.hu/api/publication/35759957 ID - 35759957 AB - The dynamics of electric power systems are widely studied through the phase synchronization of oscillators, typically with the use of the Kuramoto equation. While there are numerous well-known order parameters to characterize these dynamics, shortcoming of these metrics are also recognized. To capture all transitions from phase disordered states over phase locking to fully synchronized systems, new metrics were proposed and demonstrated on homogeneous models. In this paper, we aim to address a gap in the literature, namely, to examine how the gradual improvement of power grid models affects the goodness of certain metrics. To study how the details of models are perceived by the different metrics, 12 variations of a power grid model were created, introducing varying levels of heterogeneity through the coupling strength, the nodal powers, and the moment of inertia. The grid models were compared using a second-order Kuramoto equation and adaptive Runge–Kutta solver, measuring the values of the phase, the frequency, and the universal order parameters. Finally, frequency results of the models were compared to grid measurements. We found that the universal order parameter was able to capture more details of the grid models, especially in cases of decreasing moment of inertia. Even the most heterogeneous models showed notable synchronization, encouraging the use of such models. Finally, we show local frequency results related to the multi-peaks of static models, which implies that spatial heterogeneity can also induce such multi-peak behavior. LA - English DB - MTMT ER - TY - JOUR AU - Zsukovszkij, Konstantin AU - Papp, István TI - Comparative analysis of optical absorption and resonating dynamics of nanoantenna dopes at intense laser shots JF - EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS J2 - EUR PHYS J-SPEC TOP VL - 234 PY - 2025 SP - 3021 EP - 3028 PG - 8 SN - 1951-6355 DO - 10.1140/epjs/s11734-025-01521-2 UR - https://m2.mtmt.hu/api/publication/35890589 ID - 35890589 AB - In this study, the resonant behaviour of gold nanoparticles in the dense medium under intense similar to\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sim$$\end{document}1015-1017 W/cm2 laser irradiation by infrared pulses is explored. In particular, the enhancement of the energy absorption by the dopes in media is addressed. The particle-in-cell numeral method is used. Using numerical modelling with the EPOCH software, we investigate how nanoparticles of various shapes act as resonant nanoantennas. We analyze the absorption characteristics of the medium and calculate ionization product energies for protons, electrons and ions. Comparative analysis identifies optimal conditions for energy absorption and ionization and their enhancement using nanoparticles of different shapes and sizes, including quadrupole, dipole, and spherical shapes. We examine in detail the ionization dynamics in the presence of quadrupole nanoantennas and address energy absorption saturation. LA - English DB - MTMT ER - TY - JOUR AU - Zsukovszkij, Konstantin AU - Papp, István TI - Numerical analysis of ionization and plasmonic phenomena on gold nanodopes upon laser pulse irradiation JF - RESULTS IN PHYSICS J2 - RESULTS PHYS VL - 72 PY - 2025 PG - 38 SN - 2211-3797 DO - 10.1016/j.rinp.2025.108198 UR - https://m2.mtmt.hu/api/publication/36064886 ID - 36064886 LA - English DB - MTMT ER - TY - JOUR AU - Zsukovszkij, Konstantin AU - Papp, István TI - Ionization Dynamics in Matter with Gold Nanoparticles upon Laser Irradiation of Various Intensities, Numerical Analysis JF - PARTICLES J2 - PARTICLES-BASEL VL - 8 PY - 2025 IS - 1 PG - 11 SN - 2571-712X DO - 10.3390/particles8010027 UR - https://m2.mtmt.hu/api/publication/36072357 ID - 36072357 LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Szokol, Ágnes AU - Kámán, Judit AU - Holomb, Roman AU - Rigó, István AU - Aladi, Márk AU - Kedves, Miklós AU - Ráczkevi, Béla AU - Rácz, Péter AU - Bonyár, Attila AU - Borók, Alexandra AU - Zangana, Shireen AU - Szalóki, Melinda AU - Papp, István AU - Galbács, Gábor AU - Biró, Tamás Sándor AU - Csernai, László Pál AU - Kroó, Norbert AU - Veres, Miklós TI - Morphology studies on craters created by femtosecond laser irradiation in UDMA polymer targets embedded with plasmonic gold nanorods JF - EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS J2 - EUR PHYS J-SPEC TOP VL - 234 PY - 2025 IS - 10 SP - 3007 EP - 3013 PG - 7 SN - 1951-6355 DO - 10.1140/epjs/s11734-025-01599-8 UR - https://m2.mtmt.hu/api/publication/36084919 ID - 36084919 AB - The effect of embedded plasmonic gold nanoparticles on the crater morphology was studied in 160 µm-thick UDMA–TEGDMA copolymer films irradiated by femtosecond single pulses of a Ti:Sa laser. The plasmonic absorption of the embedded gold nanorods had a resonance at the wavelength of the laser. It was observed that by increasing the laser intensity the diameter of the craters decreased, while the depth of the craters increased. In addition, the crater depths were significantly higher in the presence of gold nanorods. A threshold intensity of 1.5·10 17 W/cm 2 has been determined, above which a doubled roughness and sevenfold increased crater volume was observed in the polymer containing gold nanorods. LA - English DB - MTMT ER - TY - JOUR AU - Zsukovszkij, Konstantin AU - Papp, István TI - Ionization of matter with resonating nanoantennas under intense laser irradiation — Numerical study JF - RADIATION PHYSICS AND CHEMISTRY: THE JOURNAL FOR RADIATION PHYSICS RADIATION CHEMISTRY AND RADIATION PROCESSING J2 - RADIAT PHYS CHEM VL - 237 PY - 2025 PG - 8 SN - 0969-806X DO - 10.1016/j.radphyschem.2025.113111 UR - https://m2.mtmt.hu/api/publication/36221797 ID - 36221797 LA - English DB - MTMT ER - TY - JOUR AU - Papp, István AU - Zsukovszkij, Konstantin TI - Particle simulation of various gold nanoantennas in laser-irradiated matter for fusion production JF - EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS J2 - EUR PHYS J-SPEC TOP VL - 234 PY - 2025 SP - 2993 EP - 2998 PG - 6 SN - 1951-6355 DO - 10.1140/epjs/s11734-025-01563-6 UR - https://m2.mtmt.hu/api/publication/36241891 ID - 36241891 AB - Recent advances in laser technology and plasmonics highlight the key role of resonating particles in boosting wave energy absorption and fusion initiation. We used numerical modeling to study the interaction between laser radiation and gold nanoparticles with different orientations. We investigated the response of gold-doped materials to intense infrared radiation, focusing on electron ejection dynamics and near-field enhancement. Optimal orientation results in an order of magnitude increase in the electric field. Furthermore, we introduce a shape that is less sensitive to orientation, giving better near-field enhancement than the original resonant nanoparticle at medium intensity field. These findings are crucial for future fusion research, particularly in the context of high-energy short laser ignition pulses within the NAPLIFE project. This article is a short overview of the presentation with the same title on Particles and Plasmas Symposium 2024 held in Budapest. LA - English DB - MTMT ER - TY - JOUR AU - Hartmann, Bálint AU - Ódor, Géza AU - Benedek, Kristóf AU - Papp, István AU - Cirunay, Michelle TI - Quantitative comparison of power grid reinforcements JF - CHAOS SOLITONS & FRACTALS J2 - CHAOS SOLITON FRACT VL - 200 PY - 2025 PG - 13 SN - 0960-0779 DO - 10.1016/j.chaos.2025.117095 UR - https://m2.mtmt.hu/api/publication/36318620 ID - 36318620 AB - This paper presents a head-to-head evaluation of three grid reinforcement strategies for the Hungarian high-voltage power grid: (1) duplicating inter-community “bridge” links, (2) inserting bypasses around poorly synchronized nodes, and (3) fortifying edges identified as cascade-triggering vulnerabilities. Built from official operator data, our grid models avoid simplifications typical in prior work and show coupling distributions in close agreement with European and North American grids. Our results show that community-based bridge duplication consistently outperforms both bypass additions and cascade-based reinforcements. It delivers the most robust increase in synchronization, frequency stability, and cascade mitigation across all tested cases. In contrast, cascade-based reinforcement is stronger under low coupling conditions, while bypass strategies present superior frequency spread control in intermediate regimes. We also discuss how Braess’ paradox is manifested in certain network configurations. As reinforcing specific lines actually decreases the grids stability, there is a need for topology-aware planning. Our line-cut cascade simulations show fat-tailed cascade time distributions at intermediate coupling strengths, which is indicative of Griffiths-type scaling near a hybrid phase transition. Simultaneously, edge behaviors return to exponential at extremes of the evaluated range. To our knowledge, this is the first quantitative comparison combining oscillator models with conventional power system analysis tools, offering a rigorous bridge between theoretical and operational perspectives. LA - English DB - MTMT ER -