Article
Engineering, Electrical & Electronic
X. Ma, M. S. Mirmoosa, S. A. Tretyakov
Summary: This study introduces a new type of waveguides designed using Metasurfaces, examines guided modes and dispersion properties, and discusses general conditions for the existence of two modes with orthogonal polarization and the same phase velocity. Further research is conducted on scenarios with nonresonant or resonant surface impedances and varying distances between two metasurfaces.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Georgios D. Kolezas, Grigorios P. Zouros
Summary: This paper investigates the interaction between electromagnetic waves and a spherical conformal metasurface. The developed full-wave method allows for the determination of the involved EM fields. The study suggests that metasurfaces with appropriately engineered impedance tensors can achieve desired scattering responses.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Optics
Zuntian Chu, Tiefu Li, Jiafu Wang, Jinming Jiang, Zhongtao Zhang, Ruichao Zhu, Yuxiang Jia, Boheng Gui, Hong Zhang, Shaobo Qu
Summary: A strategy of using anisotropic metasurfaces to achieve extremely angle-stable transparent windows is proposed. Theoretical formulas are derived to achieve high-efficiency transmission response without angular dispersion. A two-layer cascaded electromagnetic anti-reflector is designed and a prototype of extremely angle-stable transparent window is fabricated and tested.
Article
Engineering, Electrical & Electronic
Yvo L. C. de Jong
Summary: This article presents a uniform ray description for electromagnetic wave scattering by locally periodic metasurfaces of polygonal shape. The model is derived by evaluating the critical-point contributions of a physical optics scattering integral and is valid for metasurfaces with periodic bulk scattering coefficients. The scattered field is expressed in terms of reflected, transmitted, and diffracted rays that do not necessarily obey conventional geometrical constraints.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Varsha Mishra, Filippo Costa, Agostino Monorchio
Summary: A methodology for analyzing the attenuation constant of surface waves in general multilayer structures is proposed, utilizing transmission line theory to define the characteristic equation. The results are validated using completely shielded waveguide structures and applied to analyze surface wave modes in various examples, within a frequency range of 1 to 12 GHz.
Article
Acoustics
A. N. Darinskii, A. L. Shuvalov
Summary: This paper investigates the existence of interfacial acoustic waves localized at the internal boundary between two semi-infinite superlattices forming a one-dimensional phononic bicrystal. It is found that the maximum number of interfacial waves in different stopbands is three for the lowest stopband and six for any upper stopband. The study also shows that this number is actually the maximum for the waves occurring per stopband in a given bicrystal and its complementary bicrystal.
Article
Engineering, Electrical & Electronic
Constantinos Valagiannopoulos, Adilkhan Sarsen, Andrea Alu
Summary: Nonlinear materials can exhibit bistability, which can find direct application to photonic memory devices. Impedance metasurfaces producing hysteresis responses with respect to impinging beam angle under a fixed intensity profile can open new avenues towards the design of photonic systems supporting a wide range of fixed-power memory functionalities.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Ana Diaz-Rubio, Sergei A. Tretyakov
Summary: In the face of challenging requirements for future mobile communication systems, researchers are exploring the potential of creating intelligent radio environments using reconfigurable and smart metasurfaces. These metasurfaces can redirect incident waves in desired directions and their behavior when illuminated from other directions as well as how scattering from finite-sized anomalous reflectors can be estimated is crucial. Models have been developed to explain the behavior of phase-gradient metasurfaces and anomalous reflections, providing a foundation for integrating these elements into propagation channel ray-tracing models.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Optics
Dmitry A. Kuzmin, Igor Bychkov, Vladimir G. Shavrov, Vasily V. Temnov
Summary: A new concept of realizing hyperbolic plasmonic metasurfaces through anisotropic gain-loss competition is proposed in this Letter, predicting highly directional propagation and amplification of surface plasmon polaritons. The simple configuration of such metasurfaces involves lossy metallic slabs embedded in a gain matrix, with potential applications in integrated quantum light emitters and nonlinear-optical frequency converters.
Article
Engineering, Electrical & Electronic
Iman Derafshi, Nader Komjani
Summary: In this letter, a new technique based on passive 2-D Huygens metasurface is investigated for controlling the beam of a linear polarized horn antenna. The required surface electrical and magnetic impedance equivalent to HMS is calculated using plane wave terms in the spectral-domain for dominant mode. Two different structures are designed and simulated, showing improvement in aperture efficiency compared to similar works.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Federico Giusti, Stefano Maci, Enrica Martini
Summary: A novel and general approach using anisotropic modulated metasurfaces (MTSs) is proposed to suppress the open-stopband (OSB) effects in circularly polarized 1-D periodic leaky-wave antennas (LWAs). The theoretical analysis shows that the proposed anisotropic modulation exhibits a finite and regular complex propagation constant, in contrast to the sinusoidally modulated isotropic impedance. The derived closed-form solution allows for accurate design of the aperture field amplitude, and the full-wave analysis of a patch-based implementation confirms the practical applicability of the theoretical results.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Do-Hoon Kwon
Summary: This paper presents a method for designing planar modulated reactance surfaces, which are passive and lossless everywhere by optimizing the evanescent part of the aperture fields. When excited by a TM-polarized surface wave, these aperture surfaces can radiate space waves with a prescribed far-zone pattern.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Hao Chi Zhang, Chenzi Shao, Pei Hang He, Yi Fei Huang, Cun Yue Wei, Tie Jun Cui
Summary: In this paper, we develop a field-network joint dispersion analysis method to analyze complicated spoof SPP structures with finite thickness. This method can predict the dispersion relations and intrinsic high-order modes of the structures.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Optics
Hui-Jun Zhao, Fei Fan, Tian-Rui Zhang, Yun-Yun Ji, Sheng-Jiang Chang
Summary: To enhance and actively control terahertz anisotropy and chirality, a THz composite device consisting of a liquid crystal layer and an anisotropic metasurface has been designed and fabricated. By manipulating the spatial orientation of the liquid crystal optical axis, the device exhibits enhanced or offset anisotropy and tunable phase-shift range. The destruction of mirror symmetry in the LC-Si anisotropic medium enables active modulation and achieves high circular dichroism. This composite device demonstrates potential applications in THz polarization conversion and chiral transmission.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Yun-Chao Hao, Yong Zhang, Hong-Liang Yi
Summary: This article investigates the near-field radiative heat transfer (NFRHT) between nanoparticles based on moving metasurfaces. The study reveals that thermal conductivity coefficient can be enhanced or suppressed by selecting appropriate chemical potentials and particle arrangement positions, and the required threshold velocity for the thermal diode can also be significantly reduced under specific chemical potentials.
