84 citations · 400 across the 16 of their papers we have counts for
17 papers
A 2D-programmable and Scalable Reconfigurable Intelligent Surface Remotely Controlled via Digital Infrared Code
Andrey Sayanskiy, Andrey Belov, Ruslan Yafasov +4
Reconfigurable Intelligent Surfaces (RISs) are promising and relatively low-cost tools for improving signal propagation in wireless communications. An RIS assists a base station in…
Improving B1 homogeneity in abdominal imaging at 3 T with light and compact metasurface
Vsevolod Vorobyev, Alena Shchelokova, Alexander Efimtcev +5
Radiofrequency field inhomogeneity is a significant issue in imaging large fields of view in high- and ultrahigh-field MRI. Passive shimming with coupled coils or dielectric pads i…
Surface waves on self-complementary metasurfaces: intrinsic hyperbolicity, dual-directional canalization and TE-TM polarization degeneracy
Vladimir Lenets, Oleh Yermakov, Andrey Sayanskiy +4
Self-complementary metasurfaces have gained significant attention due to their unique frequency-independent transmission and reflection properties and the possibility of the polari…
A Self-Matched Leaky-Wave Antenna for Ultrahigh-Field MRI with Low SAR
G. Solomakha, J. T. Svejda, C. van Leeuwen +4
The technology of magnetic resonance imaging is developing towards higher magnetic fields to improve resolution and contrast. However, whole-body imaging at 7 T or even higher fiel…
Experimental observation of hybrid TE-TM polarized surface waves supported by hyperbolic metasurface
Oleh Y. Yermakov, Anna A. Hurshkainen, Dmitry A. Dobrykh +5
Hyperbolic metasurfaces have gained significant attention due to their extraordinary electromagnetic properties to control propagating plane waves, but the excitation and propagati…
Broadband Circular-to-Linear Polarization Conversion of Terahertz Waves Using Self-Complementary Metasurfaces
Andrey Sayanskiy, Sergei A. Kuznetsov, Daria S. Tanygina +3
In this work, we theoretically and experimentally study the conversion from a circularly polarized plane electromagnetic wave into a linearly polarized transmitted one using anisot…
Broadband Huygens' Metasurface Based on Hybrid Resonances
M. Londono, A. Sayanskiy, J. L. Araque-Quijano +2
Recently, a special class of Huygens' surfaces has been proposed which are capable of manipulation of transmitted wavefronts while exhibiting high transparency over a broad range o…
Decoupling of Two Closely Located Dipole Antennas by a Split-Loop Resonator
Masoud Sharifian Mazraeh Mollaei, Anna Hurshkainen, Sergey Kurdjumov +2
In this letter, we theoretically and experimentally prove the possibility of the complete passive decoupling for two parallel resonant dipoles by a split-loop resonator. Unlike pre…
Passive Decoupling of Two Closely Located Dipole Antennas
Masoud Sharifian Mazraeh Mollaei, Anna Hurshkainen, Sergei Kurdjumov +2
In this paper, we prove that two parallel dipole antennas can be decoupled by a similar but passive dipole located in the middle between them. The decoupling is proved for whatever…
Non-scattering Metasurface-bound Cavities for Field Localization, Enhancement, and Suppression
F. S. Cuesta, V. S. Asadchy, A. D. Sayanskiy +5
We propose and analyse metasurface-bound invisible (non-scattering) partially open cavities where the inside field distribution can be engineered. It is demonstrated both theoretic…
Locally Enhanced Image Quality with Tunable Hybrid Metasurfaces
Alena V. Shchelokova, Alexey P. Slobozhanyuk, Irina V. Melchakova +4
Metasurfaces represent a new paradigm in artificial subwavelength structures due to their potential to overcome many challenges typically associated with bulk metamaterials. The ab…
Small animal whole body imaging with metamaterial-inspired RF coil
Mikhail Zubkov, Anna Hurshkainen, Ekaterina Brui +6
Preclinical magnetic resonance imaging often requires the entire body of an animal to be imaged with sufficient quality. This is usually performed by combining regions scanned with…
A Parametric Study of Radiative Dipole Body Array Coil for 7 Tesla MRI
Anna A. Hurshkainen, Bart Steensma, Stanislav B. Glybovski +5
In this contribution we present numerical and experimental results of a parametric quantitative study of radiative dipole antennas in a phased array configuration for efficient bod…
A Novel Metamaterial-Inspired RF-coil for Preclinical Dual-Nuclei MRI
A. Hurshkainen, A. Nikulin, E. Georget +9
In this paper we propose, design and test a new dual-nuclei RF-coil inspired by wire metamaterial structures. The coil operates due to resonant excitation of hybridized eigenmodes…
Demonstration of the enhanced Purcell factor in all-dielectric structures
Alexander Krasnok, Stanislav Glybovski, Mihail Petrov +5
The Purcell effect is usually described as a modification of the spontaneous decay rate in the presence of a resonator. In plasmonics, this effect is commonly associated with a lar…
Element Decoupling of 7T Dipole Body Arrays by EBG Metasurface Structures: Experimental Verification
Anna A. Hurshkainen, Tatyana A. Derzhavskaya, Stanislav B. Glybovski +4
Metasurfaces are artificial electromagnetic boundaries or interfaces usually implemented as two-dimensional periodic structures with subwavelength periodicity and engineered proper…
Large Purcell enhancement without strong field localization
Alexander Krasnok, Stanislav Glybovski, Mihail Petrov +5
The Purcell effect is defined as the modification of spontaneous decay in the presence of a resonator, and in plasmonics it is usually associated with the large local-field enhance…