A5079103755- Graph theory and applications
- Metamaterials and Metasurfaces Applications
- Computational Drug Discovery Methods
- Advanced Antenna and Metasurface Technologies
- Orbital Angular Momentum in Optics
- Mechanical and Optical Resonators
- Geophysics and Sensor Technology
- Carbon Nanotubes in Composites
- Advanced Fiber Laser Technologies
- Free Radicals and Antioxidants
- Graphene research and applications
- Photonic and Optical Devices
- Synthesis and Properties of Aromatic Compounds
- Gyrotron and Vacuum Electronics Research
- Laser-Matter Interactions and Applications
- Electromagnetic Simulation and Numerical Methods
- Semiconductor materials and interfaces
- Terahertz technology and applications
- Antenna Design and Analysis
- Molecular Junctions and Nanostructures
- Microwave Engineering and Waveguides
- Electromagnetic Scattering and Analysis
- Molecular spectroscopy and chirality
- Advanced Mathematical Theories and Applications
- Optical Polarization and Ellipsometry
KU Leuven
2021-2025
Arak University
2019-2020
Iran University of Science and Technology
2018
Islamic Azad University Mahshahr
2010
University of Tehran
2007-2009
Islamic Azad University of Garmsar
2008
properties of the optical surface plasmons in microwave and terahertz frequencies using subwavelength artificial structures to construct negative permittivity.The spoof also benefit from realization ultrathin corrugated metallic strips [14], as they are compatible with printed circuit boards (PCBs) integrated technologies.Since propagating localized were experimentally realized PCBs 2013 2014 [14, 15], this area flourishes prospective applications emerging circuits, sensing, wireless...
Space-time-varying metamaterials based on uniform-velocity modulation have spurred considerable interest over the past decade. We present here an extensive investigation of accelerated-modulation space-time metamaterials. Using tools general relativity, we establish their electrodynamic principles and describe fundamental phenomena, in comparison with physics moving-matter media. show that electromagnetic beam propagating metamaterial is bent its course, which reveals such a medium curves...
This article presents a global and extended perspective of electrodynamic metamaterials formed by space time engineered modulations, which we name generalized space-time modulation (GSTEM) metamaterials, or GSTEMs. describes from unified <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">spacetime viewpoint</i> introduces xmlns:xlink="http://www.w3.org/1999/xlink">accelerated metamaterials</i> as an extra type dynamic metamaterials. First, it...
Abstract Space-time–modulated systems have attracted significant interest over the past decade due to their ability manipulate electromagnetic waves in unprecedented ways. Here, we introduce a new type of space-time–modulated structure, space-time wedge , consisting two interfaces moving at different velocities, which results either closing or opening wedges. Using boundary conditions, derive closed-form solutions for scattering such and leverage these unveil underlying physics, including...
We present space-time metamaterials as the natural successors to time-varying metamaterials, highlighting their additional properties and potential benefits. These offer a virtually unlimited range of new challenges based on dynamic levels, structures, velocity regimes. They particularly provide rich opportunities for transition engineering, enabling spectral transformations control classical quantum state transitions.
We present space-time metamaterials as the natural successors to time-varying metamaterials, highlighting their additional properties and potential benefits. These offer a virtually unlimited range of new challenges based on dynamic levels, structures, velocity regimes. They particularly provide rich opportunities for transition engineering, enabling spectral transformations control classical quantum state transitions.
Abstract We solve the problem of electron scattering at a potential temporal step discontinuity. For this purpose, instead Schrödinger equation, we use Dirac for access to back-scattering and relativistic solutions. show that back-scattering, which is associated with gauge symmetry breaking, requires vector potential, whereas scalar induces only Aharonov–Bohm type energy transitions. derive probabilities, are found be later-forward later-backward nature, wave being effect, compare results...
Recent research developments in the area of spacetime metamaterial structures and systems have raised new questions as to how physics fundamental phenomena is altered presence modulation. In this context, we present a generalized comparative description phenomenon total internal reflection (TIR) at different dynamic interfaces. Such interfaces include, beyond classical corresponding boundaries moving bodies (moving interface--moving matter systems), formed by traveling-wave step modulation...
Space-time modulation-based metamaterials have recently spurred considerable interest, owing to the fundamental addition of time dimension medium parameters and resulting novel properties potential applications. However, implementation most related structures---e.g., involving step, slab, or gradient discontinuities---has been hindered by impossible requirement infinitely prohibitively large device sizes. Here, we provide a solution this issue, consisting in space-time transposition...
The PI polynomial of a molecular graph is defined to be the sum X(|E(G)|-N(e)) + |V(G)|(|V(G)|+1)/2 - |E(G)| over all edges G, where N(e) number parallel e. In this paper, phenylenic nanotubes and nanotori are computed. Several open questions also included.
We present a generalized finite-difference time-domain (FDTD) scheme to simulate moving electromagnetic structures with arbitrary space–time configurations. This is local adaptation and 2+1-D extension of the uniform 1+1-D recently reported in Deck-Léger et al., 2023. The adaptation, which allowed by inherently matched nature Yee cell conventional cell, extends range applicability 2023 that involve multiple velocity profiles while being fully compatible absorbing boundary conditions standard...
PI and Szeged indices are two of the most important topological defined in chemistry. In this study, linear [n]-phenylenes a cyclic hexagonal-square chain consisting n mutually isomorphic hexagonal chains were computed. The multiple phenylene, which is 2-dimensional case phenylenic nanotube nanotorus, determined.
Purpose The purpose of this paper is to calculate the back scattering response from single, finite and infinite arrays nonlinear antennas like case where are exposed high-value signals such as lightning strokes. Design/methodology/approach In paper, authors have used a recently introduced optimization technique called intelligent water drop. Findings results exhibit that method by faster more accurate than other conventional algorithms, i.e. particle swarm genetic algorithm....
We solve the problem of electron scattering at a potential temporal step discontinuity. show that Schrodinger equation cannot account for in this problem, necessitating resort to Dirac equation, and breaking gauge symmetry requires vector potential, scalar inducing only Aharonov-Bohm type energy transitions. derive probabilities, later forward backward nature, with later-backward wave being relativistic effect, compare results those spatial classical electromagnetic counterparts problem....
We present the first systematic study of Accelerated Space-Time Engineered-Modulation (ASTEM) metamaterials, or ASTEMs. Leveraging tools general relativity, we establish their electrodynamic principles and describe related fundamental phenomena. show that an electromagnetic beam propagating in ASTEM is bent its course, which reveals such a medium curves space-time for light, similarly to gravitation, further demonstrate black hole white gravity analogs. This paper extends fields...
Space-time modulation systems have garnered significant attention due to their resemblance moving-matter and promising applications. Unlike conventional systems, do not involve net motion of matter, are therefore easier implement restricted subluminal velocities. However, canonical wave-medium interaction aspects, such as scattering energy-momentum relations, remained largely unexplored. In this paper, we address the aforementioned issues for three dynamic systems: blocs, moving-perturbation...