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Journal articles on the topic 'Metamaterial'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Tzarouchis, Dimitrios C., Maria Koutsoupidou, Ioannis Sotiriou, Konstantinos Dovelos, Dionysios Rompolas, and Panagiotis Kosmas. "Electromagnetic metamaterials for biomedical applications: short review and trends." EPJ Applied Metamaterials 11 (2024): 7. http://dx.doi.org/10.1051/epjam/2024006.

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This mini-review examines the most prominent features and usages of metamaterials, such as metamaterial-based and metamaterial-inspired RF components used for biomedical applications. Emphasis is given to applications on sensing and imaging systems, wearable and implantable antennas for telemetry, and metamaterials used as flexible absorbers for protection against extreme electromagnetic (EM) radiation. A short discussion and trends on the metamaterial composition, implementation, and phantom preparation are presented. This review seeks to compile the state-of-the-art biomedical systems that u

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2

Smolyaninov, Igor I., and Vera N. Smolyaninova. "Metamaterial superconductors." Nanophotonics 7, no. 5 (2018): 795–818. http://dx.doi.org/10.1515/nanoph-2017-0115.

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AbstractSearching for natural materials exhibiting larger electron-electron interactions constitutes a traditional approach to high-temperature superconductivity research. Very recently, we pointed out that the newly developed field of electromagnetic metamaterials deals with the somewhat related task of dielectric response engineering on a sub-100-nm scale. Considerable enhancement of the electron-electron interaction may be expected in such metamaterial scenarios as in epsilon near-zero (ENZ) and hyperbolic metamaterials. In both cases, dielectric function may become small and negative in su

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Gu, Leilei, Hongzhan Liu, Zhongchao Wei, Ruihuan Wu, and Jianping Guo. "Optimized Design of Plasma Metamaterial Absorber Based on Machine Learning." Photonics 10, no. 8 (2023): 874. http://dx.doi.org/10.3390/photonics10080874.

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Metamaterial absorbers have become a popular research direction due to their broad application prospects, such as in radar, infrared imaging, and solar cell fields. Usually, nanostructured metamaterials are associated with a large number of geometric parameters, and traditional simulation designs are time consuming. In this paper, we propose a framework for designing plasma metamaterial absorbers in both a forward prediction and inverse design composed of a primary prediction network (PPN) and an auxiliary prediction network (APN). The framework can build the relationship between the geometric

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4

Tan, Plum, and Singh. "Surface Lattice Resonances in THz Metamaterials." Photonics 6, no. 3 (2019): 75. http://dx.doi.org/10.3390/photonics6030075.

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Diffraction of light in periodic structures is observed in a variety of systems including atoms, solid state crystals, plasmonic structures, metamaterials, and photonic crystals. In metamaterials, lattice diffraction appears across microwave to optical frequencies due to collective Rayleigh scattering of periodically arranged structures. Light waves diffracted by these periodic structures can be trapped along the metamaterial surface resulting in the excitation of surface lattice resonances, which are mediated by the structural eigenmodes of the metamaterial cavity. This has brought about fasc

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Rizzi, Gianluca, Marco Valerio d’Agostino, Patrizio Neff, and Angela Madeo. "Boundary and interface conditions in the relaxed micromorphic model: Exploring finite-size metastructures for elastic wave control." Mathematics and Mechanics of Solids 27, no. 6 (2021): 1053–68. http://dx.doi.org/10.1177/10812865211048923.

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In this paper, we establish well-posed boundary and interface conditions for the relaxed micromorphic model that are able to unveil the scattering response of fully finite-size metamaterial samples. The resulting relaxed micromorphic boundary value problem is implemented in finite-element simulations describing the scattering of a square metamaterial sample whose side counts nine unit cells. The results are validated against a direct finite-element simulation encoding all the details of the underlying metamaterial’s microstructure. The relaxed micromorphic model can recover the scattering meta

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Zhou, Xiaoshu, Qide Xiao, and Han Wang. "Metamaterials Design Method based on Deep learning Database." Journal of Physics: Conference Series 2185, no. 1 (2022): 012023. http://dx.doi.org/10.1088/1742-6596/2185/1/012023.

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Abstract In recent years, deep learning has risen to the forefront of many fields, overcoming challenges previously considered difficult to solve by traditional methods. In the field of metamaterials, there are significant challenges in the design and optimization of metamaterials, including the need for a large number of labeled data sets and one-to-many mapping when solving inverse problems. Here, we will use deep learning methods to build a metamaterial database to achieve rapid design and analysis methods of metamaterials. These technologies have significantly improved the feasibility of m

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Li, Yafei, Jiangtao Lv, Qiongchan Gu, et al. "Metadevices with Potential Practical Applications." Molecules 24, no. 14 (2019): 2651. http://dx.doi.org/10.3390/molecules24142651.

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Metamaterials are “new materials” with different superior physical properties, which have generated great interest and become popular in scientific research. Various designs and functional devices using metamaterials have formed a new academic world. The application concept of metamaterial is based on designing diverse physical structures that can break through the limitations of traditional optical materials and composites to achieve extraordinary material functions. Therefore, metadevices have been widely studied by the academic community recently. Using the properties of metamaterials, many

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8

Hu, Hua-Liang, Ji-Wei Peng, and Chun-Ying Lee. "Dynamic Simulation of a Metamaterial Beam Consisting of Tunable Shape Memory Material Absorbers." Vibration 1, no. 1 (2018): 81–92. http://dx.doi.org/10.3390/vibration1010007.

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Metamaterials are materials with an artificially tailored internal structure and unusual physical and mechanical properties such as a negative refraction coefficient, negative mass inertia, and negative modulus of elasticity, etc. Due to their unique characteristics, metamaterials possess great potential in engineering applications. This study aims to develop new acoustic metamaterials for applications in semi-active vibration isolation. For the proposed state-of-the-art structural configurations in metamaterials, the geometry and mass distribution of the crafted internal structure is employed

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9

Hou, Zheyu, Pengyu Zhang, Mengfan Ge, et al. "Metamaterial Reverse Multiple Prediction Method Based on Deep Learning." Nanomaterials 11, no. 10 (2021): 2672. http://dx.doi.org/10.3390/nano11102672.

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Metamaterials and their related research have had a profound impact on many fields, including optics, but designing metamaterial structures on demand is still a challenging task. In recent years, deep learning has been widely used to guide the design of metamaterials, and has achieved outstanding performance. In this work, a metamaterial structure reverse multiple prediction method based on semisupervised learning was proposed, named the partially Conditional Generative Adversarial Network (pCGAN). It could reversely predict multiple sets of metamaterial structures that can meet the needs by i

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10

Gao, Shanshi, Weidong Liu, Liangchi Zhang, and Asit Kumar Gain. "A New Polymer-Based Mechanical Metamaterial with Tailorable Large Negative Poisson’s Ratios." Polymers 12, no. 7 (2020): 1492. http://dx.doi.org/10.3390/polym12071492.

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Mechanical metamaterials have attracted significant attention due to their programmable internal structure and extraordinary mechanical properties. However, most of them are still in their prototype stage without direct applications. This research developed an easy-to-use mechanical metamaterial with tailorable large negative Poisson’s ratios. This metamaterial was microstructural, with cylindrical-shell-based units and was manufactured by the 3D-printing technique. It was found numerically that the present metamaterial could achieve large negative Poisson’s ratios up to −1.618 under uniaxial

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11

Gamal, Moh Danil Hendry, Yan Soerbakti, Zamri Zamri, et al. "Negative refractive index anomaly characteristics of SRR hexagonal array metamaterials." Science, Technology and Communication Journal 4, no. 2 (2024): 57–60. http://dx.doi.org/10.59190/stc.v4i2.261.

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Metamaterials possess distinct characteristics that make them very suitable for scientific investigation. This phenomenon's hallmark has left scientists perplexed and skeptical. Researchers have conducted numerous studies to explore the composition of one or more metamaterials. This project focused on the development of a linear-sequence metamaterial. Next, we examined the alterations in the optical characteristics of the metamaterial. The utilized frequency range is 0 to 9 GHz. We construct the hexagonal split ring resonance (SRR) metamaterial with a radius of 2.9 mm, consisting of one to fou

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Yuchao, Ma, Mo Juan, Xu Ke, Li Xiang, and Sun Xinbo. "Material Parameters Acquisition and Sound Insulation Performance analysis of Membrane-type Acoustic Metamaterials Applied for Transformer." E3S Web of Conferences 136 (2019): 01031. http://dx.doi.org/10.1051/e3sconf/201913601031.

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As a light-weight and ultra-thin artificial material, acoustic metamaterial have more different attributes than natural material. The study of sound insulation for acoustic metamaterial is hot, and the membrane-type acoustic metamaterials supplement the deficiency of linear sound insulation materials. The physical material parameters (young modulus and loss factors)of base material of membrane-type acoustic metamaterials (PVC) is obtained by cantilever beam dynamic measurement method. The acoustic metamaterial sound insulation analysis is simulated by CAE method based on the material parameter

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Zhang, Yumei, Jie Zhang, Ye Li, et al. "Research Progress on Thin-Walled Sound Insulation Metamaterial Structures." Acoustics 6, no. 2 (2024): 298–330. http://dx.doi.org/10.3390/acoustics6020016.

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Acoustic metamaterials (AMs) composed of periodic artificial structures have extraordinary sound wave manipulation capabilities compared with traditional acoustic materials, and they have attracted widespread research attention. The sound insulation performance of thin-walled structures commonly used in engineering applications with restricted space, for example, vehicles’ body structures, and the latest studies on the sound insulation of thin-walled metamaterial structures, are comprehensively discussed in this paper. First, the definition and math law of sound insulation are introduced, alon

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14

Yang, Jing Jing, Ming Huang, Jun Sun, and Jun Dong Yang. "Metamaterial Sensor Based on WGM." Key Engineering Materials 495 (November 2011): 28–32. http://dx.doi.org/10.4028/www.scientific.net/kem.495.28.

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Sensor utilizing metamaterials have opened up a new ﬁeld of considerable interest. We extend here the works of our group about metamaterial sensor based on Whispering Gallery Mode (WGM), which is constructed with a microring resonator sensor coated with metamaterial layer. We demonstrate that our sensor possesses higher sensitivity than the traditional sensor since the amplification and penetration of evanescent wave by metamaterials.

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15

Ahmad, Ali, Abeer Asad, Pocholo Pacpaco, Claire Thampongphan, and Muhammad Hasibul Hasan. "Application of Metamaterial in Renewable Energy: A Review." International Journal of Engineering Materials and Manufacture 9, no. 2 (2024): 60–80. http://dx.doi.org/10.26776/ijemm.09.02.20243.04.

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Metamaterial advancements hold promise for compact renewable energy harvesting, capturing acoustic, electromagnetic, mechanical, and solar energy on a modest scale across global industries. Engineered structures surpass natural material limitations, offering capabilities unattainable in traditional counterparts. This investigation explores metamaterials' manipulation of acoustic, electromagnetic, mechanical, and solar energy. Mechanical metamaterials convert strain into electrical energy, applicable from interstellar travel to terrestrial infrastructure. Precision-configured acoustic metamater

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16

Ren, Yi, Minghui Duan, Rui Guo, and Jing Liu. "Printed Transformable Liquid-Metal Metamaterials and Their Application in Biomedical Sensing." Sensors 21, no. 19 (2021): 6329. http://dx.doi.org/10.3390/s21196329.

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Metamaterial is becoming increasingly important owing to its unique physical properties and breakthrough applications. So far, most metamaterials that have been developed are made of rigid materials and structures, which may restrict their practical adaptation performances. Recently, with the further development of liquid metal, some efforts have explored metamaterials based on such tunable electronic inks. Liquid metal has high flexibility and good electrical conductivity, which provides more possibilities for transformable metamaterials. Here, we developed a new flexible liquid-metal metamat

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Datta, Srijan, Saptarshi Mukherjee, Xiaodong Shi, et al. "Negative Index Metamaterial Lens for Subwavelength Microwave Detection." Sensors 21, no. 14 (2021): 4782. http://dx.doi.org/10.3390/s21144782.

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Metamaterials are engineered periodic structures designed to have unique properties not encountered in naturally occurring materials. One such unusual property of metamaterials is the ability to exhibit negative refractive index over a prescribed range of frequencies. A lens made of negative refractive index metamaterials can achieve resolution beyond the diffraction limit. This paper presents the design of a metamaterial lens and its use in far-field microwave imaging for subwavelength defect detection in nondestructive evaluation (NDE). Theoretical formulation and numerical studies of the me

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18

Gao, Xu, Jiyuan Wei, Jiajing Huo, Zhishuai Wan, and Ying Li. "The Vibration Isolation Design of a Re-Entrant Negative Poisson’s Ratio Metamaterial." Applied Sciences 13, no. 16 (2023): 9442. http://dx.doi.org/10.3390/app13169442.

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An improved re-entrant negative Poisson’s ratio metamaterial based on a combination of 3D printing and machining is proposed. The improved metamaterial exhibits a superior load-carrying and vibration isolation capacity compared to its traditional counterpart. The bandgap of the proposed metamaterial can be easily tailored through various assemblies. Additionally, particle damping is introduced to enhance the diversity of bandgap design, improve structural damping performance, and achieve better vibration isolation at low and medium frequencies. An experiment and simulation were conducted to as

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19

Yang, Jing Jing, Ming Huang, Hao Tang, Jia Zeng, and Ling Dong. "Metamaterial Sensors." International Journal of Antennas and Propagation 2013 (2013): 1–16. http://dx.doi.org/10.1155/2013/637270.

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Metamaterials have attracted a great deal of attention due to their intriguing properties, as well as the large potential applications for designing functional devices. In this paper, we review the current status of metamaterial sensors, with an emphasis on the evanescent wave amplification and the accompanying local field enhancement characteristics. Examples of the sensors are given to illustrate the principle and the performance of the metamaterial sensor. The paper concludes with an optimistic outlook regarding the future of metamaterial sensor.

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Zhang, Wu, Jiahan Lin, Zhengxin Yuan, et al. "Terahertz Metamaterials for Biosensing Applications: A Review." Biosensors 14, no. 1 (2023): 3. http://dx.doi.org/10.3390/bios14010003.

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In recent decades, THz metamaterials have emerged as a promising technology for biosensing by extracting useful information (composition, structure and dynamics) of biological samples from the interaction between the THz wave and the biological samples. Advantages of biosensing with THz metamaterials include label-free and non-invasive detection with high sensitivity. In this review, we first summarize different THz sensing principles modulated by the metamaterial for bio-analyte detection. Then, we compare various resonance modes induced in the THz range for biosensing enhancement. In additio

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Yan, Dexian, Yi Wang, Yu Qiu, et al. "A Review: The Functional Materials-Assisted Terahertz Metamaterial Absorbers and Polarization Converters." Photonics 9, no. 5 (2022): 335. http://dx.doi.org/10.3390/photonics9050335.

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When metamaterial structures meet functional materials, what will happen? The recent rise of the combination of metamaterial structures and functional materials opens new opportunities for dynamic manipulation of terahertz wave. The optical responses of functional materials are greatly improved based on the highly-localized structures in metamaterials, and the properties of metamaterials can in turn be manipulated in a wide dynamic range based on the external stimulation. In the topical review, we summarize the recent progress of the functional materials-based metamaterial structures for flexi

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Machac, Jan. "A negative permittivity metamaterial composed of planar resonators with randomly detuned resonant frequencies and randomly distributed in space." International Journal of Microwave and Wireless Technologies 10, no. 9 (2018): 1028–34. http://dx.doi.org/10.1017/s1759078718001046.

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AbstractThis paper investigates metamaterials composed of resonant particles with negative electric polarizability located in a three-dimensional net. The main problem in fabricating these materials is the spread of the resonant frequencies of particular planar resonators. This spread is caused by the tolerances of the fabrication process for planar resonators. The simulation shows that there is a limit to the dispersion of resonant frequencies that allow the metamaterial to behave as a metamaterial with negative effective permittivity. Two metamaterials with a negative real part of the effect

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Saravana Jothi, N. S., and A. Hunt. "Active mechanical metamaterial with embedded piezoelectric actuation." APL Materials 10, no. 9 (2022): 091117. http://dx.doi.org/10.1063/5.0101420.

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Metamaterials are artificially structured materials and exhibit properties that are uncommon or non-existent in nature. Mechanical metamaterials show exotic mechanical properties, such as negative stiffness, vanishing shear modulus, or negative Poisson’s ratio. These properties stem from the geometry and arrangement of the metamaterial unit elements and, therefore, cannot be altered after fabrication. Active mechanical metamaterials aim to overcome this limitation by embedding actuation into the metamaterial unit elements to alter the material properties or mechanical state. This could pave th

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Kaschke, Johannes, and Martin Wegener. "Optical and Infrared Helical Metamaterials." Nanophotonics 5, no. 4 (2016): 510–23. http://dx.doi.org/10.1515/nanoph-2016-0005.

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AbstractBy tailoring metamaterials with chiral unit cells, giant optical activity and strong circular dichroism have been achieved successfully over the past decade. Metamaterials based on arrays of metal helices have revolutionized the field of chiral metamaterials, because of their capability of exhibiting these pronounced chiro-optical effects over previously unmatched bandwidths. More recently, a large number of new metamaterial designs based on metal helices have been introduced with either optimized optical performance or other chiro-optical properties for novel applications.The fabricat

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Vangelatos, Z., K. Komvopoulos, and CP Grigoropoulos. "Vacancies for controlling the behavior of microstructured three-dimensional mechanical metamaterials." Mathematics and Mechanics of Solids 24, no. 2 (2018): 511–24. http://dx.doi.org/10.1177/1081286518810739.

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Mechanical metamaterials are designed to exhibit enhanced properties not found in natural materials or to bolster the properties of existing materials. The theoretical foundations for tuning the mechanical properties have been established, including topological states, controllable buckling behavior, and quasi-two-dimensional mechanical metamaterials with structures containing vacancies. However, the fabrication and experimental procedures to study these structures at the microscale have not been developed yet and the three-dimensional (3D) architectures examined to date are fairly limited. In

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Karimi Mahabadi, Rayehe, Taha Goudarzi, Romain Fleury, Bakhtiyar Orazbayev, and Reza Naghdabadi. "Effect of mechanical nonlinearity on the electromagnetic response of a microwave tunable metamaterial." Journal of Physics D: Applied Physics 55, no. 20 (2022): 205102. http://dx.doi.org/10.1088/1361-6463/ac5209.

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Abstract Tunable metamaterials functionalities change in response to external stimuli. Mechanical deformation is known to be an efficient approach to tune the electromagnetic response of a deformable metamaterial. However, in the case of large mechanical deformations, which are usually required to fully exploit the potential of the tunable metamaterials, the linear elastic mechanical analysis is no longer suitable. Nevertheless, nonlinear mechanical analysis is missing in the studies of mechanically tunable metamaterials. In this paper, we study the importance of considering nonlinearity in me

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Liu, Xiajun, Feng Xia, Mei Wang, Jian Liang, and Maojin Yun. "Working Mechanism and Progress of Electromagnetic Metamaterial Perfect Absorber." Photonics 10, no. 2 (2023): 205. http://dx.doi.org/10.3390/photonics10020205.

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Electromagnetic metamaterials are artificial subwavelength composites with periodic structures, which can interact strongly with the incident light to achieve effective control of the light field. Metamaterial absorbers can achieve nearly 100% perfect absorption of incident light at a specific frequency, so they are widely used in sensors, optical switches, communication, and other fields. Based on the development history of metamaterials, this paper discusses the research background and significance of metamaterial perfect absorbers. Some perfect absorption mechanisms, such as impedance match

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Fan, Yuancheng, Xuan He, Fuli Zhang, et al. "Fano-Resonant Hybrid Metamaterial for Enhanced Nonlinear Tunability and Hysteresis Behavior." Research 2021 (August 13, 2021): 1–9. http://dx.doi.org/10.34133/2021/9754083.

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Artificial resonant metamaterial with subwavelength localized filed is promising for advanced nonlinear photonic applications. In this article, we demonstrate enhanced nonlinear frequency-agile response and hysteresis tunability in a Fano-resonant hybrid metamaterial. A ceramic cuboid is electromagnetically coupled with metal cut-wire structure to excite the high-Q Fano-resonant mode in the dielectric/metal hybrid metamaterial. It is found that the significant nonlinear response of the ceramic cuboid can be employed for realization of tunable metamaterials by exciting its magnetic mode, and th

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Sun, Zhanshuo, Xin Wang, Junlin Wang, Hao Li, Yuhang Lu, and Yu Zhang. "Switchable Multifunctional Terahertz Metamaterials Based on the Phase-Transition Properties of Vanadium Dioxide." Micromachines 13, no. 7 (2022): 1013. http://dx.doi.org/10.3390/mi13071013.

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Currently, terahertz metamaterials are studied in many fields, but it is a major challenge for a metamaterial structure to perform multiple functions. This paper proposes and studies a switchable multifunctional multilayer terahertz metamaterial. Using the phase-transition properties of vanadium dioxide (VO2), metamaterials can be controlled to switch transmission and reflection. Transmissive metamaterials can produce an electromagnetically induced transparency-like (EIT-like) effect that can be turned on or off according to different polarization angles. The reflective metamaterial is divided

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Fitzgerald, Thomas M., and Michael A. Marciniak. "Full Optical Scatter Analysis for Novel Photonic and Infrared Metamaterials." Advances in Science and Technology 75 (October 2010): 240–45. http://dx.doi.org/10.4028/www.scientific.net/ast.75.240.

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Artificial structures with sub-optical wavelength features are engineered to feature non-conventional values for material properties such as optical and infrared permeability and permittivity. Such artificial structures are referred to as optical and infrared metamaterials.[1] The application space of electromagnetic metamaterials includes novel sub-wavelength waveguides and antennas, true time delay devices, optical filters, and plasmonic electronic-optical interfaces.[2] In this paper presents an optical diagnostic technique adapted for measuring and analyzing bidirectional polarimetric scat

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Zeng, Yi, Liyun Cao, Sheng Wan, et al. "Inertially amplified seismic metamaterial with an ultra-low-frequency bandgap." Applied Physics Letters 121, no. 8 (2022): 081701. http://dx.doi.org/10.1063/5.0102821.

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In last two decades, it has been theoretically and experimentally demonstrated that seismic metamaterials are capable of isolating seismic surface waves. Inertial amplification mechanisms with small mass have been proposed to design metamaterials to isolate elastic waves in rods, beams, and plates at low frequencies. In this Letter, we propose an alternative type of seismic metamaterial providing an ultra-low-frequency bandgap induced by inertial amplification. A unique kind of inertially amplified metamaterial is first conceived and designed. Its bandgap characteristics for flexural waves are

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Lan, Jun, Yunpeng Liu, Tao Wang, Yifeng Li, and Xiaozhou Liu. "Acoustic coding metamaterial based on non-uniform Mie resonators." Applied Physics Letters 120, no. 16 (2022): 163501. http://dx.doi.org/10.1063/5.0071897.

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Acoustic coding metamaterials have important applications in simplifying design procedure and providing a flexible approach to realize complicated functions. Here, we design a 1-bit coding metamaterial for flexibly manipulating the sound propagation path. The capability of subwavelength acoustic propagation control on coding metamaterial is attributed to the dipole-like characteristic of the Mie resonator. The Mie resonator with a subwavelength scale is constructed with a non-uniform structure, which can generate Mie resonance with dipole-like characteristic. Two kinds of coding elements are i

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Zhai, Zirui, Yong Wang, and Hanqing Jiang. "Origami-inspired, on-demand deployable and collapsible mechanical metamaterials with tunable stiffness." Proceedings of the National Academy of Sciences 115, no. 9 (2018): 2032–37. http://dx.doi.org/10.1073/pnas.1720171115.

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Origami has been employed to build deployable mechanical metamaterials through folding and unfolding along the crease lines. Deployable metamaterials are usually flexible, particularly along their deploying and collapsing directions, which unfortunately in many cases leads to an unstable deployed state, i.e., small perturbations may collapse the structure along the same deployment path. Here we create an origami-inspired mechanical metamaterial with on-demand deployability and selective collapsibility through energy analysis. This metamaterial has autonomous deployability from the collapsed st

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Hu, Longfei, Ketian Shi, Xiaoguang Luo, Jijun Yu, Bangcheng Ai, and Chao Liu. "Application of Additively Manufactured Pentamode Metamaterials in Sodium/Inconel 718 Heat Pipes." Materials 14, no. 11 (2021): 3016. http://dx.doi.org/10.3390/ma14113016.

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In this study, pentamode metamaterials were proposed for thermal stress accommodation of alkali metal heat pipes. Sodium/Inconel 718 heat pipes with and without pentamode metamaterial reinforcement were designed and fabricated. Then, these heat pipes were characterized by startup tests and thermal response simulations. It was found that pentamode metamaterial reinforcement did not affect the startup properties of sodium/Inconel 718 heat pipes. At 650–950 °C heating, there was a successful startup of heat pipes with and without pentamode metamaterial reinforcement, displaying uniform temperatur

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Amalia, Riska, Defrianto Defrianto, Yan Soerbakti, Vepy Asyana, and Hewa Yaseen Abdullah. "Simulation and analysis of triangular structure metamaterial properties at microwave frequencies for medical sensor applications." Science, Technology and Communication Journal 5, no. 1 (2024): 15–20. https://doi.org/10.59190/stc.v5i1.286.

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The development of antenna technology is increasingly developing in medical sensor applications. The medical sensor antenna can be strengthened with a split ring resonator (SRR) metamaterial structure. Metamaterial is an artificial material that has high resonance manufacturing properties and this can potentially be implemented into microstrip antenna structures. This research aims to design, simulate and analyze the characteristics of metamaterials regarding the frequency function and performance of an antenna combination of 1 – 4 metamaterials with a triangular SRR ring radius of 3.5 mm. The

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Wang, Xingzhong, Shiteng Rui, Shaokun Yang, Weiquan Zhang, and Fuyin Ma. "A low-frequency pure metal metamaterial absorber with continuously tunable stiffness." Applied Mathematics and Mechanics 45, no. 7 (2024): 1209–24. http://dx.doi.org/10.1007/s10483-024-3158-7.

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AbstractTo address the incompatibility between high environmental adaptability and deep subwavelength characteristics in conventional local resonance metamaterials, and overcome the deficiencies in the stability of existing active control techniques for band gaps, this paper proposes a design method of pure metal vibration damping metamaterial with continuously tunable stiffness for wideband elastic wave absorption. We design a dual-helix narrow-slit pure metal metamaterial unit, which possesses the triple advantage of high spatial compactness, low stiffness characteristics, and high structura

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Soerbakti, Yan, Saktioto, Ari Sulistyo Rini, et al. "Optimization of Semiconductor-Based SRR Metamaterials as Sensors." Journal of Physics: Conference Series 2696, no. 1 (2024): 012015. http://dx.doi.org/10.1088/1742-6596/2696/1/012015.

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Abstract The development of hybrid sensor media is needed to achieve more efficient, sensitive, and accurate performance. Efforts to modify the structure of conventional metamaterials are carried out by integrating semiconductor materials which aim to improve the characteristics of optical properties, electrical properties, and sensitivity as sensors. This study aims to analyze and investigate changes in the optical properties of semiconductor-based metamaterials. The research was conducted through simulation and numerical methods to design and characterize the SRR metamaterial geometry, with

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Xie, Xin, Xiao Ming Wang, and Yu Lin Mei. "Acoustic Metamaterial Design Method Based on Green Coordinate Transformation." Materials Science Forum 976 (January 2020): 15–24. http://dx.doi.org/10.4028/www.scientific.net/msf.976.15.

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Acoustic metamaterials have great application prospects in eliminating vibration and noise, but they are difficult to manufacture due to their anisotropy. This paper utilizes the Green coordinate transformation method to design acoustic metamaterials by combining with the transformation acoustics theory. Because the Green coordinate transformation is the pseudo-conformal mapping in three-dimensional coordinates, the anisotropy of designed metamaterials can be weakened. And also, the genetic algorithm is employed to optimize the anisotropy of metamaterials and reduce the designed metamaterial p

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Zhao, Long, Zeqi Lu, Hu Ding, and Liqun Chen. "A viscoelastic metamaterial beam for integrated vibration isolation and energy harvesting." Applied Mathematics and Mechanics 45, no. 7 (2024): 1243–60. http://dx.doi.org/10.1007/s10483-024-3159-7.

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AbstractLocally resonant metamaterials have low-frequency band gaps and the capability of converging vibratory energy in the band gaps at resonant cells. It has been demonstrated by several researchers that the dissipatioin of vibratory energy within the band gap can be improved by using viscoelastic materials. This paper designs an integrated viscoelastic metamaterial for energy harvesting and vibration isolation. The viscoelastic metamaterial is achieved by a viscoelastic beam periodically arrayed with spatial ball-pendulum nonlinear energy harvesters. The nonlinear resonator with an energy

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Choi, Jung Sik, and Gil Ho Yoon. "An Acoustic Hyperlens with Negative Direction Based on Double Split Hollow Sphere." Journal of Theoretical and Computational Acoustics 27, no. 02 (2019): 1850025. http://dx.doi.org/10.1142/s2591728518500251.

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This study develops a new acoustic negative-refraction metamaterial that utilizes a synthesized double split hollow sphere (DSHS) for its unit cell. Recent relevant research has affirmed the concept that acoustic metamaterials can show unusual behavior that has not been observed in nature previously. However, as some hypothetical metamaterial designs have material properties not found in nature, the realization of practical metamaterials requires practical and complicated models. As a contribution to the development of acoustic metamaterials, the present study proposes a new anisotropic unit s

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Jiang, Haoqing, Yue Wang, Zijian Cui, Xiaoju Zhang, Yongqiang Zhu, and Kuang Zhang. "Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption." Micromachines 13, no. 5 (2022): 715. http://dx.doi.org/10.3390/mi13050715.

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Terahertz metamaterial plays a significant role in the development of imaging, sensing, and communications. The function of conventional terahertz metamaterials was fixed after fabrication. They can only achieve a single function and do not have adjustable characteristics, which greatly limits the scalability and practical application of metamaterial. Here, we propose a vanadium dioxide-based terahertz metamaterial device, which is switchable between being a transmitter and an absorber. The transmission and absorption characteristics and temperature tunable properties of phase change metamater

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Craig, Steven R., Bohan Wang, Xiaoshi Su, et al. "Extreme material parameters accessible by active acoustic metamaterials with Willis coupling." Journal of the Acoustical Society of America 151, no. 3 (2022): 1722–29. http://dx.doi.org/10.1121/10.0009771.

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Active acoustic metamaterials incorporate electric circuit elements that input energy into an otherwise passive medium to aptly modulate the effective material properties. Here, we propose an active acoustic metamaterial with Willis coupling to drastically extend the tunability of the effective density and bulk modulus with the accessible parameter range enlarged by at least two orders of magnitude compared to that of a non-Willis metamaterial. Traditional active metamaterial designs are based on local resonances without considering the Willis coupling that limit their accessible effective mat

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BOURAS, Khedidja, Abdelhadi LABIAD, Chaker SALEH, and Mouloud BOUZOUAD. "Emulation of metamaterial waveguides." Algerian Journal of Signals and Systems 3, no. 3 (2018): 117–24. http://dx.doi.org/10.51485/ajss.v3i3.67.

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In this work, we are interested by emulating metamaterial microwave waveguides which behave like conventional metallic ones. We use metamaterial layers based on two types of unit cells. The first one is a connected cross type unit cell which leads to a metamaterial with a near zero refraction index (n1≈ 0). The second one is a disconnected cross type unit cell which leads to a metamaterial with a refraction index greater than unity (n2 >1). With these two type of metamaterials we can define, in the metamaterial layer, different sections each one can have a refraction index equal to n1 or n2

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Bang, Sanghun, Jeonghyun Kim, Gwanho Yoon, Takuo Tanaka, and Junsuk Rho. "Recent Advances in Tunable and Reconfigurable Metamaterials." Micromachines 9, no. 11 (2018): 560. http://dx.doi.org/10.3390/mi9110560.

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Metamaterials are composed of nanostructures, called artificial atoms, which can give metamaterials extraordinary properties that cannot be found in natural materials. The nanostructures themselves and their arrangements determine the metamaterials’ properties. However, a conventional metamaterial has fixed properties in general, which limit their use. Thus, real-world applications of metamaterials require the development of tunability. This paper reviews studies that realized tunable and reconfigurable metamaterials that are categorized by the mechanisms that cause the change: inducing temper

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Baz, Amr M. "Bandgap and mode shape tuning of piezoelectric metamaterial." Journal of the Acoustical Society of America 151, no. 4 (2022): A156. http://dx.doi.org/10.1121/10.0010956.

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The mode shape of piezoelectric metamaterials is tuned by manipulating spatially the electrical boundary conditions of the piezo-elements, in a desired and controlled manner, in order to tailor the wave propagation characteristics through these metamaterials. The proposed concept relies on the fact that open-circuit piezo-elements made of lead-zirconate-titanate ( PZT 4) are twice as stiff as the same piezo-elements when operating under short-circuit conditions. Appropriate switching of the boundary conditions of the different piezo-elements between open and short-circuit conditions results in

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Neil, Thomas R., Zhiyuan Shen, Daniel Robert, Bruce W. Drinkwater, and Marc W. Holderied. "Moth wings are acoustic metamaterials." Proceedings of the National Academy of Sciences 117, no. 49 (2020): 31134–41. http://dx.doi.org/10.1073/pnas.2014531117.

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Metamaterials assemble multiple subwavelength elements to create structures with extraordinary physical properties (1–4). Optical metamaterials are rare in nature and no natural acoustic metamaterials are known. Here, we reveal that the intricate scale layer on moth wings forms a metamaterial ultrasound absorber (peak absorption = 72% of sound intensity at 78 kHz) that is 111 times thinner than the longest absorbed wavelength. Individual scales act as resonant (5) unit cells that are linked via a shared wing membrane to form this metamaterial, and collectively they generate hard-to-attain broa

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He, Yufang, Xiangtian Kong, Juntao He, Junpu Ling, and Mingyao Pi. "A novel all-metal metamaterial for constructing relativistic slow wave structure." AIP Advances 12, no. 3 (2022): 035345. http://dx.doi.org/10.1063/5.0083360.

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In recent vacuum electronic devices, metamaterials have shown an obvious advantage of miniaturization. Due to increasing miniaturization demand, research of metamaterials in high-power microwave (HPM) field is now also a hotspot. For better applications of metamaterials, there are still two issues to be solved, the low space limit current of the structure and the low uniformity of the working electric field. To solve these problems, we construct a novel all-metal metamaterial structure by applying a 45° rotational arrangement in space and a four-support rod structure. This new metamaterial str

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Xu, Rui-Jia, and Yu-Sheng Lin. "Actively MEMS-Based Tunable Metamaterials for Advanced and Emerging Applications." Electronics 11, no. 2 (2022): 243. http://dx.doi.org/10.3390/electronics11020243.

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In recent years, tunable metamaterials have attracted intensive research interest due to their outstanding characteristics, which are dependent on the geometrical dimensions rather than the material composition of the nanostructure. Among tuning approaches, micro-electro-mechanical systems (MEMS) is a well-known technology that mechanically reconfigures the metamaterial unit cells. In this study, the development of MEMS-based metamaterial is reviewed and analyzed based on several types of actuators, including electrothermal, electrostatic, electromagnetic, and stretching actuation mechanisms.

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Enaki, Nicolae A., Ion Munteanu, Tatiana Paslari, et al. "Topological Avenue for Efficient Decontamination of Large Volumes of Fluids via UVC Irradiation of Packed Metamaterials." Materials 16, no. 13 (2023): 4559. http://dx.doi.org/10.3390/ma16134559.

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Nowadays, metamaterials application enjoys notoriety in fluid decontamination and pathogen annihilation, which are frequently present in polluted fluids (e.g., water, blood, blood plasma, air or other gases). The depollution effect is largely enhanced by UVC irradiation. The novelty of this contribution comes from the significant increase by packing of the total surface of metamaterials in contact with contaminated fluids. Packed metamaterial samples are subjected to UVC irradiation, with expected advantages for implant sterilization and long-term prevention of nosocomial infections over large

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Khodaei, Mohammad Javad, Amin Mehrvarz, Reza Ghaffarivardavagh, and Nader Jalili. "Retrieving effective acoustic impedance and refractive index for size mismatch samples." AIP Advances 12, no. 6 (2022): 065224. http://dx.doi.org/10.1063/5.0082371.

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In this paper, we have presented an analytical solution to extract the effective properties of acoustic metamaterials from the measured complex transmission and reflection coefficients when the metamaterial and impedance tube have different sizes. We first considered the air gap as a separate domain and modeled the problem as a bilayer metamaterial inside a duct. Then, we established theoretically that when the dimensions of an acoustic metamaterial are known, the effective properties may be derived by solving a set of eight linear equations. Finally, we assessed the proposed technique using n

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