Article
Physics, Applied
Yaxi Pan, Jian Dong, Meng Wang, Heng Luo, Yadgar Abdulkarim
Summary: This paper proposes a novel reverse design method using an improved bacterial foraging optimization algorithm and a deep belief network to establish the relationship between geometric structure and electromagnetic response, allowing for efficient optimization of structural parameters and accelerating the design process for frequency selective surface (FSS) absorbers. The proposed method is validated through simulation and experimental results and is applied to design a transparent FSS absorber with an ultra-bandwidth of 8-18 GHz, showing outstanding characteristics suitable for radar stealth and photovoltaic solar energy applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Chaohao Chen, Lei Ding, Baolei Liu, Ziqing Du, Yongtao Liu, Xiangjun Di, Xuchen Shan, Chenxiao Lin, Min Zhang, Xiaoxue Xu, Xiaolan Zhong, Jianfeng Wang, Lingqian Chang, Benjamin Halkon, Xin Chen, Faliang Cheng, Fan Wang
Summary: This study presents a method to enhance the spatial resolution of single-beam super-resolution microscopy by modulating excitation intensity. By exploiting the dynamic optical nonlinearity in upconversion nanoparticles and a weighted finite difference imaging algorithm, higher resolution images than traditional superlinear microscopy can be obtained.
Article
Engineering, Electrical & Electronic
Min Guo, Di Sang, Fang Yuan, Tiantian Guo, Yuejun Zheng, Qiang Chen, Yunqi Fu
Summary: This article proposes a frequency-selective rasorber (FSR) built on multilayer resistive sheets, which achieves a broad absorption band. The absorption and transmission performance of FSR with single-layer/multilayer resistive sheets are analyzed using the equivalent circuit model, demonstrating that FSR with multilayer resistive sheets can obtain a broader absorption band. A smaller-sized and higher design freedom multilayer resonator (MR) is proposed, and FSR based on multilayer resistive sheets using MR is designed. Simulated and measured results show the realization of broad absorption band and transmission band with low insertion loss.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Materials Science, Multidisciplinary
Yalan Yang, Jianping Wang, Chaoyun Song, Rui Pei, Jayakrishnan M. Purushothama, Youran Zhang
Summary: This paper proposes a flexible embroidery-based metamaterial absorber (MA) that can absorb electromagnetic waves of specific frequency. It is found that the resistive loss of the embroidered frequency selective surface (FSS) plays a dominant role in consuming electromagnetic energy. A suitable embroidery density is the premise for effective electromagnetic energy absorption.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Ceramics
Moufida Saad, Marwa Ennouri, M. I. Sayyed, Amira Ben Gouider Trabelsi, Fatemah Homoud Alkallas, Habib Elhouichet
Summary: This work investigates the properties of Ag-containing lead-boro-phosphate glasses in terms of structure, optics, refractive index dispersion, and shielding. It is found that Ag NPs precipitation occurs, as evidenced by XRD patterns and TEM images. The formation of Ag NPs leads to a depolymerization process and an increase in glass density, as well as a reduction in optical band gap energy. The optical performance of the glass is improved due to the formation of Ag NPs, making it suitable for various multi-functional optical devices.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Nunzio Cennamo, Domenico Del Prete, Francesco Arcadio, Luigi Zeni
Summary: A novel sensing method for temperature measurements of liquids using plasmonic resonance in multimode plastic optical fibers has been devised. The method involves connecting two different D-shaped POF platforms to measure temperature changes in the solution covering the thermosensitive platform. This approach allows for the measurement of temperature by varying the light launch conditions in the surface plasmon resonance POF sensor as a result of temperature changes.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Jinbong Kim, Hong-Kyu Jang, Jaecheol Oh, Jisang Park
Summary: This study proposes a rational optimum design procedure for broadband radar absorbers composed of a square-loop-shaped resistive frequency selective surface (FSS) placed on an E-glass fabric/epoxy laminate. The effects of the FSS surface resistance and dielectric substrate on the absorber design and performance are examined. The feasibility of the design method is validated through experimental demonstration and simulation results.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2023)
Article
Chemistry, Physical
Yuhang Wang, Zhiquan He, Xubo Lai, Boyang Liu, Yibao Chen, Liuwan Zhang, Fengping Wang
Summary: The resistive switching parameters of anatase phase polycrystalline TiO2 thin film can be controlled by light illumination and oxygen atmosphere, resulting in a forming free bipolar resistive switching effect with ON/OFF ratio over 10^4. Surface potential shift accompanied by resistance switching was reversible, and the device demonstrated good optical erasing performance. The mechanism for the observed switching behavior was confirmed to be charge trapping/detrapping, providing a new way to fabricate controllable and optical erasable resistive switching devices in nanoscale.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Ankitha E. Bangera, Kumar Appaiah
Summary: This study proposes three biocompatible configurations for Si-based ultra-wideband optical applications, utilizing nano Au-islands and Ti-compounds to improve optical absorption characteristics for wavelengths ranging from ultraviolet to infrared.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Multidisciplinary
Niloufar Pirouzfam, Kursat Sendur
Summary: The study demonstrates that by optimizing the parameters of anisotropic random rough surfaces, spectral absorptance values exceeding 95% can be achieved for tungsten surfaces. Additionally, anisotropic random rough surfaces broaden the bandwidth of the high absorption region and increase the absorption enhancements in the visible and near-infrared regions.
Article
Engineering, Electrical & Electronic
Ze Huang, Zhinan Luo, Yong Zhao, Haoran Li, Kaixuan Si, Yi Han, Ling Miao, Jianjun Jiang
Summary: This communication reports a wideband radar cross section (RCS) reduction of an elliptic surface in TM polarization. The main scattering sources and mechanisms of the elliptic surface are accurately identified using the inverse synthetic aperture radar (ISAR) imaging technique and high-frequency approximation theory. The use of frequency selective surface (FSS) absorber and tapered resistive sheets (TRSs) effectively suppress specular reflection and handle scattering from trailing edges. Both simulation and measurement results demonstrate a 10 dB RCS reduction (RCSR) within the 1.35-4.9 GHz TM polarization range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Multidisciplinary Sciences
Somayeh Souri, Naby Hadilou, H. A. Navid, Rasoul Sadighi Bonabi, Abbas Anvari
Summary: The optical properties of asymmetric nanoshells were comprehensively investigated using the dipolar model and effective medium theory, revealing the impact of symmetry breaking on plasmon hybridization and absorption spectrum. Offsetting the core position and changing the internal geometry of nanoparticles can significantly alter resonance frequencies and absorption efficiencies. Additionally, higher order multipolar plasmon modes can appear in the spectrum of asymmetric nanoshells, depending on the material composition and filling factor.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
M. Zulqarnain, S. S. Ali, Uzma Hira, J. F. Feng, M. Khan, M. Rizwan, K. Javed, Ghulam Farid, M. S. Hasan
Summary: Nanocrystalline Ni-Zn ferrite nanoparticles NixZn1-xFe2O4 were synthesized and their properties were analyzed. Increasing nickel content led to changes in crystalline structure, magnetic behavior, and optical and dielectric properties of the nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Ze Huang, Zhinan Luo, Gengjiang Yao, Rui Li, Yong Zhao, Qiyang Cao, Yi Han, Ling Miao, Jianjun Jiang
Summary: This study reports a method for wide-angle monostatic radar cross section (RCS) reduction of a metal plate, achieving significant RCS reduction in different angular ranges through the use of absorbers and resistive sheets.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Hardware & Architecture
Mohammad M. Hosseini, Joao Pedro, Antonio Napoli, Nelson Costa, Jaroslaw E. Prilepsky, Sergei K. Turitsyn
Summary: This paper proposes an integer linear programming framework to optimize metro-aggregation filterless horseshoe networks, taking into account the specific requirements of DSCM-based P2MP coherent transceivers. The results indicate that a considerable reduction in amplifier count is possible while ensuring that end-to-end performance thresholds are met.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Physics, Applied
D. Ramaccia, A. Alu, A. Toscano, F. Bilotti
Summary: Temporal metamaterials are artificial materials with electromagnetic properties that change over time, allowing for the realization of non-homogeneous temporal media or stepwise transitions. By modeling wave propagation through a generalized temporal multilayer structure, higher-order transfer functions can be synthesized, enabling the design of novel electromagnetic and optical devices with tailored scattering responses. This approach leverages the temporal dimension instead of the spatial dimension typically used in optical and electromagnetic multilayered structures.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Alessio Monti, Andrea Alu, Alessandro Toscano, Filiberto Bilotti
Summary: This study proposes a novel approach to design ultrathin high-Q passband filters by utilizing multipolar resonances sustained by all-dielectric metasurfaces. The rigorous analytical model and numerical simulations confirm the effectiveness of the design, which can achieve high Q-factor resonances and be used for self-filtering aperture antennas with higher out-of-band selectivity.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Physics, Applied
X. Fang, M. Li, D. Ramaccia, A. Toscano, F. Bilotti, D. Ding
Summary: Self-adaptive retro-reflective planar Doppler cloak is designed to compensate the Doppler effect of a moving scatterer and maintain a stable radar cross section. It uses space-time modulated metasurfaces for frequency conversion and retro-reflection. This self-adaptive Doppler cloak enhances the undetectability of cloaked moving objects.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Zahra Hamzavi Zarghani, Alessio Monti, Andrea Alu, Filiberto Bilotti, Alessandro Toscano
Summary: This work explores acoustic embedded scattering eigenstates and demonstrates the role of resonant metasurfaces in wave scattering. The findings have significant implications for acoustic systems.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
L. Stefanini, D. Ramaccia, A. Toscano, F. Bilotti
Summary: In this Letter, a rainbow-like scattering process is reported at the interface of a boundary-induced temporal metamaterial realized by instantaneously opening the boundary conditions of a parallel plate waveguide. By changing the conductivity of one of the metallic plates, an equivalent temporal interface between two different media is created, and the monochromatic wave propagating into the waveguide gets scattered into a polychromatic rainbow in free space. The relationships between the waveguide mode and the raising rainbow are derived, and the underlying physics is applied to control the temporal rainbow by design.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Mirko Barbuto, Andrea Alu, Filiberto Bilotti, Alessandro Toscano
Summary: To achieve a smart electromagnetic environment, researchers propose a new design strategy to add reconfigurability to reflective metasurfaces, enabling the implementation of reconfigurable intelligent surfaces. By controlling the scattering pattern of reflective metasurfaces, the complexity of the control system is reduced, resulting in a more practical solution.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Emanuele Maiorana, Davide Ramaccia, Luca Stefanini, Alessandro Toscano, Filiberto Bilotti, Patrizio Campisi
Summary: In this article, the feasibility of using electromagnetic scattering to recognize users is evaluated. A recognition framework that utilizes X-band antennas and measured scattering parameters is proposed. Results show that this approach can be used to implement a robust biometric system or enhance recognition performance when combined with other hand characteristics.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Mirko Barbuto, Andrea Alu, Filiberto Bilotti, Alessandro Toscano
Summary: This article discusses the possibility of using composite vortex theory to manipulate the response of reflective and radiating systems. By adjusting a few parameters, it is possible to easily control the radiation properties of patch antennas and the scattering pattern of reflective surfaces.
PROCEEDINGS OF THE 2022 21ST MEDITERRANEAN MICROWAVE SYMPOSIUM (MMS 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
A. Monti, A. Alu, A. Toscano, F. Bilotti
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
A. Monti, A. Alu, A. Toscano, F. Bilotti
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
D. Ramaccia, A. Toscano, F. Bilotti
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Article
Engineering, Electrical & Electronic
Davide Ramaccia, Dimitrios L. Sounas, Angelica Marini, Alessandro Toscano, Filiberto Bilotti
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
A. Marini, D. Ramaccia, A. Toscano, F. Bilotti
2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
A. Marini, D. Ramaccia, A. Toscano, F. Bilotti
2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
D. Ramaccia, A. Alu, A. Toscano, F. Bilotti
2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)
(2020)
