Relevant bibliographies by topics / Metamaterial

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Metamaterial'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 April 2025

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Journal articles on the topic "Metamaterial"

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Smolyaninov, Igor I., and Vera N. Smolyaninova. "Metamaterial superconductors." Nanophotonics 7, no. 5 (May 24, 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 substantial portions of the relevant four-momentum space, leading to enhancement of the electron pairing interaction. This approach has been verified in experiments with aluminum-based metamaterials. Metamaterial superconductor with Tc=3.9 K have been fabricated, which is three times that of pure aluminum (Tc=1.2 K), which opens up new possibilities to improve the Tc of other simple superconductors considerably. Taking advantage of the demonstrated success of this approach, the critical temperature of hypothetical niobium, MgB2- and H2S-based metamaterial superconductors is evaluated. The MgB2-based metamaterial superconductors are projected to reach the liquid nitrogen temperature range. In the case of an H2S-based metamaterial, the projected Tc appears to reach ~250 K.
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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 utilize metamaterial concepts for enhancing their performance in some form or another. The goal is to highlight the diverse applications of metamaterials and demonstrate how different metamaterial techniques impact EM biomedical applications from RF to THz frequency range. Insights and open problems are discussed, illuminating the prototyping process.
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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 (July 27, 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 parameters of metamaterials and their optical response (reflection spectra, absorption spectra) from a large number of training samples, thus solving the problem of time-consuming and case-by-case numerical simulations in traditional metamaterial design. This framework can not only improve forward prediction more accurately and efficiently but also inverse design metamaterial absorbers from a given required optical response. It was verified that it is also applicable to absorbers of different structures and materials. Our results show that it can be used in metamaterial absorbers, chiral metamaterials, metamaterial filters, and other fields.
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Tan, Plum, and Singh. "Surface Lattice Resonances in THz Metamaterials." Photonics 6, no. 3 (June 26, 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 fascinating opportunities such as lattice-induced transparency, strong nearfield confinement, and resonant field enhancement and line-narrowing of metamaterial structural resonances through lowering of radiative losses. In this review, we describe the mechanisms and implications of metamaterial-engineered surface lattice resonances and lattice-enhanced field confinement in terahertz metamaterials. These universal properties of surface lattice resonances in metamaterials have significant implications for the design of resonant metamaterials, including ultrasensitive sensors, lasers, and slow-light devices across the electromagnetic spectrum.
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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 (November 20, 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 metamaterial’s behavior for a wide range of frequencies and for all possible angles of incidence, thus showing that it is suitable to describe dynamic anisotropy. Finally, thanks to the model’s computational performances, we can design a metastructure combining metamaterials and classical materials in such a way that it acts as a protection device while providing energy focusing in specific collection points. These results open important perspectives for the short-term design of sustainable structures that can control elastic waves and recover energy.
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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 (January 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 more complex metamaterial designs and provided new metamaterial design and analysis ideas.
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Li, Yafei, Jiangtao Lv, Qiongchan Gu, Sheng Hu, Zhigang Li, Xiaoxiao Jiang, Yu Ying, and Guangyuan Si. "Metadevices with Potential Practical Applications." Molecules 24, no. 14 (July 22, 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 functional metadevices have been well investigated and further optimized. In this article, different metamaterial structures with varying functions are reviewed, and their working mechanisms and applications are summarized, which are near-field energy transfer devices, metamaterial mirrors, metamaterial biosensors, and quantum-cascade detectors. The development of metamaterials indicates that new materials will become an important breakthrough point and building blocks for new research domains, and therefore they will trigger more practical and wide applications in the future.
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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 (July 18, 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 to induce the local resonance inside the material. Therefore, a stopband in the dispersion curve can be created because of the energy gap. For conventional metamaterials, the stopband is fixed and unable to be adjusted in real-time once the design is completed. Although the metamaterial with distributed resonance characteristics has been proposed in the literature to extend its working stopband, the efficacy is usually compromised. In order to increase its adaptability to time-varying disturbance, several semi-active metamaterials have been proposed. In this study, the incorporation of a tunable shape memory alloy (SMA) into the configuration of metamaterial is proposed. The repeated resonance unit consisting of SMA beams is designed and its theoretical formulation for determining the dynamic characteristics is established. For more general application, the finite element model of this smart metamaterial is also derived and simulated. The stopband of this metamaterial beam with different configurations in the arrangement of the SMA absorbers was investigated. The result shows that the proposed model is able to predict the unique dynamic characteristics of this smart metamaterial beam. Moreover, the tunable stopband of the metamaterial beam with controlling the state of SMA absorbers was also demonstrated.
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Hou, Zheyu, Pengyu Zhang, Mengfan Ge, Jie Li, Tingting Tang, Jian Shen, and Chaoyang Li. "Metamaterial Reverse Multiple Prediction Method Based on Deep Learning." Nanomaterials 11, no. 10 (October 11, 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 inputting the required target spectrum. This model could reach a mean average error (MAE) of 0.03 and showed good generality. Compared with the previous metamaterial design methods, this method could realize reverse design and multiple design at the same time, which opens up a new method for the design of new metamaterials.
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Zhang, Yumei, Jie Zhang, Ye Li, Dan Yao, Yue Zhao, Yi Ai, Weijun Pan, and Jiang Li. "Research Progress on Thin-Walled Sound Insulation Metamaterial Structures." Acoustics 6, no. 2 (March 26, 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, alongside the primary methods of sound insulation testing of specimens. Secondly, the main sound insulation acoustic metamaterial structures are summarized and classified, including membrane-type, plate-type, and smart-material-type sound insulation metamaterials, boundaries, and temperature effects, as well as the sound insulation research on composite structures combined with metamaterial structures. Finally, the research status, challenges, and trends of sound insulation metamaterial structures are summarized. It was found that combining the advantages of metamaterial and various composite panel structures with optimization methods considering lightweight and proper wide frequency band single evaluator has the potential to improve the sound insulation performance of composite metamaterials in the full frequency range. Relative review results provide a comprehensive reference for the sound insulation metamaterial design and application.
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Dissertations / Theses on the topic "Metamaterial"

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Ni, Sisi (Sisi Sophie). "Phononic metamaterials based on complex geometries : "a new kind of metamaterial"." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89957.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references.
Facing the growing challenges of energy, environment, security and disease treatment, the demand for novel materials are growing. While the material centric approach have resulted in development of new materials for advanced applications, we introduce a geometric approach as a complementary point of view for further innovation in this ever expanding and growing field. Inspired by the ubiquitous fractals-like geometry of in natures, the scale transformation (i.e. dilation or contraction) is included in the framework since fractal geometries shows structures at all scales (usually discrete and finite in physical world). We developed our framework using metamaterials since it enable us to design "atoms" or "molecules" and their relative arrangement with greater freedom (i.e. not limited by the chemical bond or ionic bond in classical materials system). We studied metamaterials using prefractals from both exact-self similar fractal and random fractal samples. For exact-self similar fractals, we choose H tree based prefractals and Hilbert Curve prefractals bounded system given their unique geometric properties and wide applications. Guided by the framework, we investigated several key parameters (e.g. level of iteration, geometric anisotropy, impedance contrast, arrangement of subunit, resolution) that would dictate the dispersion behavior of the system. It was found that for exact-self similar prefractals, multiple spectrum bandgaps (i.e. broadband response) can be achieved with increased level of iterations where translation symmetry is imposed through boundary condition. Furthermore, the transition from scale dependence and independent described by the general framework has been observed for all the samples we studied. Furthermore, for single prefractal resonator, subwavelength (~1/75[lambda]) behavior has been observed and explained using a simple analytical model. For metamaterials based on fractional Brownian motion, the Hurst constant is found to be a good indicator of phononic behavior of the system, besides other parameters studied. Our findings does not only expand the repertoire for novel materials by introducing the ubiquitous yet unconventional geometry to metamaterials; but also have interdisciplinary applications in biology, seismology, arts, hence shine lights on our understanding of nature.
by Sisi (Sophie) Ni.
Ph. D.
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Strikwerda, Andrew. "Metamaterial enhanced coupling." Thesis, Boston University, 2012. https://hdl.handle.net/2144/31611.

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Thesis (Ph.D.)--Boston University
PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.
In the past decade interest in metamaterials has risen dramatically. This is due, in large part, to metamaterials' ability to exhibit electromagnetic behavior not normally found in nature. This is because these artificial structures display a strong electromagnetic response as a result of their geometry, as opposed to their chemistry, and that response typically dominates that of the substrate they are placed on. As a result, metamaterials can couple free space radiation in previously unheard of ways, and in this thesis I examine several of these coupling mechanisms. After an appropriate discussion of theoretical and experimental tools required for metamaterial study, the thesis turns to the metamaterial substrate and explores the coupling effects of the metamaterial and the substrate itself. We discuss the theory and experimentally demonstrate that the metamaterial and substrate composite can couple free space radiation for use in enhanced dielectric sensing, perfect absorption, and even mechanical deflection for electromagnetic detection. In addition to coupling with dielectric materials, the near field response of a metamaterial can also couple with another metamaterial. Subsequently, this thesis investigates the coupling between a pair of identical split ring resonators, and develops a general framework for evaluating the mode hybridization that results from their near field interaction. In fact, we find that the near field coupling is extremely sensitive to the relative orientation of the two metamaterials, and results in mode splitting between the two resonators. By manipulating their lateral displacement, the coupling, and the mode splitting, can be altered. In this way, an unprecedented modulation of the metamaterial response is demonstrated. Finally, we turn our attention to the effects that metamaterial behavior has on the far field response. Specifically, we focus on the symmetry, or lack thereof, of the unit cell and show that it manifests itself as a birefringence in the far field. As a result, metamaterials can be used as wave retarders to couple between polarization states. Herein we analyze this behavior and experimentally demonstrate functioning metamaterial based terahertz waveplates that are highly efficient at a previously unachieved sub wavelength size.
2031-01-01
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Li, Lianbo. "Metamaterial based superdirectivity." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:65f10679-cbf2-4c86-897e-8121225c44eb.

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A model-supporting, simple, compact, robust and high efficiency two- element parasitic superdirective array comprising electrically small reso- nant metamaterial elements, namely singly split resonator rings (SSRRs), is predicted by an analytical model and is verified by CST simulation re- sults. The analytical model is built by combining a method of calculating a two-SSRR array's far fild radiated energy density and a well working equivalent circuit for a two-SSRR parasitic array. This model is capable of easily but accurately predicting the far field radiation behaviours of an electrically small parasitic array of two SSRRs (the two SSRRs are not necessarily standard and identical), based on certain information of the array, namely the SSRRs' dimensions, the SSRRs' electrical components (L, C and R), the SSRRs' rotating orientation angles (α1 and α2), the two SSRRs's separation (d) and the array's operation frequency. The impor- tance of this analytical model in designing parasitic superdirective arrays is discussed. Simulation results show that the model predicted two-SSRR parasitic superdirective structure (the `CC' structure) can achieve an end- fire directivity of 4.36, with an elements' separation d = 4mm working at 1:914GHz, and can maintain an efficiencyciency as high as 98:6%. After a short discussion of the design principle behind the `CC' structure, improved su- perdirective structures of are identified and studied based on simulation results. Among these structures, the 'CCLr' structure can achieve the largest directivity value of 5.06 (very close to 5.25, the theoretical limit value of a two-dipole array) with a moderate efficiency of 81:4%. A com- parison between these two-SSRR parasitic superdirective structures (the `CC' and its improved versions) and two commercial two-element Yagi an- tennas show that these two-SSRR structures achieve better directive per- formances than the commercial two-element Yagi antennas do. Through performing the study of near field energy ow for magnetic dipole based structures (analytical results) and SSRR based structures (simulation re- sults), with the help of the concept of causal surfaces, the physical reason behind the superdirectivity phenomenon is revealed.
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Shepard, III Ralph Hamilton. "Metamaterial Lens Design." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194734.

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Developments in nanotechnology and material science have produced optical materials with astonishing properties. Theory and experimentation have demonstrated that, among other properties, the law of refraction is reversed at an interface between a naturally occurring material and these so-called metamaterials. As the technology advances metamaterials have the potential to vastly impact the field of optical science.In this study we provide a foundation for future work in the area of geometric optics and lens design with metamaterials. The concept of negative refraction is extended to derive a comprehensive set of first-order imaging principles as well as an exhaustive aberration theory to 4th order. Results demonstrate congruence with the classical theory; however, negative refraction introduces a host of novel properties. In terms of aberration theory, metamaterials present the lens designer with increased flexibility. A singlet can be bent to produce either positive or negative spherical aberration (regardless of its focal length), its contribution to coma can become independent of its conjugate factor, and its field curvature takes on the opposite sign of its focal power. This is shown to be advantageous in some designs such as a finite conjugate relay lens; however, in a wider field of view landscape lens we demonstrate a metamaterial's aberration properties may be detrimental.This study presents the first comprehensive investigation of metamaterial lenses using industry standard lens design software. A formal design study evaluates the performance of doublet and triplet lenses operating at F/5 with a 100 mm focal length, a 20° half field of view, and specific geometric constraints. Computer aided optimization and performance evaluation provide experimental controls to remove designer-induced bias from the results. Positive-index lenses provide benchmarks for comparison to metamaterial systems subjected to identical design constraints. We find that idiosyncrasies in a metamaterial lens' aberration content can be exploited to produce imaging systems that are superior to their conventional counterparts. However, in some circumstances the reduced low-order aberration content in a metamaterial lens reduces the effectiveness of aberration balancing and stop shifting. Through a series of design experiments the relative advantages and challenges of using metamaterials in lens design are revealed.
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Prat, Camps Jordi. "Shaping magnetic felds with superconductor-metamaterial hybrids." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/309138.

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El magnetisme és molt important en diverses àrees de la ciència i la tecnologia, cobrint un rang molt ampli d'escales i temes. En aquesta tesis presentem el desenvolupament teòric i la realització experimental de diversos dispositius nous pel control dels camps magnètics. Pel disseny d'aquests s'han emprat diverses estratègies; la teoria de l'òptica de transformació s'ha combinat amb resultats obtinguts directament de les equacions de Maxwell, i les propostes idealitzades han esdevingut dispositius reals mitjançant la combinació de materials ferromagnètics i superconductors formant diferents metamaterials magnètics. En primer lloc presentem l'estudi referent a les capes invisibilitat magnètica. De manera anàloga a com actuaria una capa d'invisibilitat per llum visible, una capa d'invisibilitat magnètica evita que els camps penetrin al seu interior al mateix temps que la capa i el seu contingut són magnèticament indetectables des de l'exterior. En aquesta tesis presentem el desenvolupament de diferents dissenys de capa d'invisibilitat, centrant-nos en un sistema bicapa superconductor-ferromagnètic. Aquesta bicapa ha estat construïda i provada amb èxit. La concentració de camps magnètics també ha estat estudiada. Hem dissenyat una capa concentradora magnètica cilíndrica, la qual concentra els camps magnètics aplicats externs en el seu orifici interior. Alhora, aquesta mateixa capa expulsa el camp magnètic cap a l'exterior quan la font de camp se situa a l'orifici interior. S'han fabricat algunes d'aquestes capes concentradores emprant materials superconductors i ferromagnètics i les seves propietats s'han verificat experimentalment. A més a més també hem demostrat que les capes permeten incrementar l'acoblament magnètic entre circuits. Aquesta propietat l'hem aplicat experimentalment per demostrar que les capes concentradores permeten millorar la transmissió d'energia elèctrica sense fils. Seguidament hem estudiat la transmissió de camps magnètics. A diferència de les ones electromagnètiques que es propaguen fàcilment dins de guies d'ones o fibres òptiques, els camps magnètics decauen ràpidament a mesura que ens allunyem de la font. A fi de superar aquesta limitació hem desenvolupat un sistema de "mànega magnètica" que permet la transferència de camps magnètics estàtics fins a llargues distàncies i que es pot construir combinant adequadament capes superconductores i ferromagnètiques. El disseny l'hem validat a partir de simulacions numèriques i desenvolupaments analítics. Algunes "mànegues" s'han fabricat i les seves propietats ha estat experimentalment demostrades. Finalment hem desenvolupat un forat de cuc magnètic. Inspirats pels forats de cuc cosmològics, que connecten dos punts de l'espai a través d'un camí que se situa fora de l'espai tridimensional convencional, hem desenvolupat un dispositiu capaç de crear l'efecte equivalent per camps magnètics estàtics. Així, el forat de cuc magnètic connecta magnèticament dos punts de l'espai a través d'un camí que és magnèticament indetectable. El dispositiu està format per una "mànega magnètica" recoberta d'una esfera superconductora i una "metasuperfície" ferromagnètica. Les seves propietats han estat estudiades teòricament i el dispositiu ha estat construït. Això ha permès demostrar, també, les seves característiques de manera experimental. En resum, aquesta tesis conté el desenvolupament teòric i la realització experimental de diversos dispositius que permeten la manipulació de camps magnètics. A banda d'estudiar diversos problemes concrets com la invisibilitat magnètica, la concentració o la transmissió de camps, la present recerca ha donat lloc a tot un conjunt d'"eines" que permeten el control i la manipulació de camps magnètics d'una manera general.
Magnetism is very important in various areas of science and technology, covering a wide range of scales and topics. In this thesis we present the theoretical development and the experimental realization of various novel devices to control magnetic fields. Their design is based on different strategies; transformation optics theory is combined with solutions directly obtained from Maxwell equations, and ideal designs are turned into real devices combining superconducting and ferromagnetic materials forming different magnetic metamaterials. We first study the cloaking of magnetic fields. Analogous to the concept of an "invisibility" cloak for light, a cloak for static magnetic fields prevents fields to penetrate in its interior and makes the cloak itself and its content magnetically undetectable from the exterior. Different designs of magnetic cloak are developed and a bilayer superconductor-ferromagnetic cylindrical cloak is experimentally built and tested. The concentration of magnetic fields is also addressed. A cylindrical magnetic concentrating shell is designed, demonstrating that it concentrates external fields in its interior hole and it also expels the field of internal sources towards the exterior. Different concentrating shells are experimentally built using superconducting and ferromagnetic materials and their properties are validated. We also demonstrate that concentrating shells increase the magnetic coupling between circuits. We apply this property to experimentally demonstrate they enhance the wireless transfer of power. The transfer of static magnetic fields is also studied. Different from electromagnetic waves that easily propagate in waveguides or optical fibers, magnetic fields rapidly decay as one moves far from the source. To overcome this limitation we develop the magnetic hose, a design that allows to transfer static magnetic fields to arbitrary distances and can be realized with an adequate combination of superconducting and ferromagnetic shells. The design is validated using numerical calculations and analytical developments. Some hoses are experimentally built and their properties are demonstrated. Finally we develop a magnetic wormhole. Inspired by cosmological wormholes, that connect two points in space through a path that is out of the conventional 3D space, we study an analogous effect for static magnetic fields. The magnetic wormhole magnetically connects two points in space through a path that is magnetically undetectable. It is composed of an interior magnetic hose surrounded by a spherical superconducting shell and a spherical ferromagnetic metasurface. An actual magnetic wormhole is experimentally built and its properties are demonstrated. To sum up, this thesis contains the theoretical development and the experimental realization of different devices to manipulate magnetic fields. In addition to addressing different particular problems, like magnetic cloaking, concentration or magnetic field transfer, this research has resulted in a whole set of new "tools" to shape and control static magnetic fields in a general way.
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Tan, Szu Hau. "Metamaterial for Radar Frequencies." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17465.

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The objective of this thesis is to investigate a new design of periodic metamaterial (MTM) structure for radar cross-section (RCS) reduction application on aircraft and ships. MTMs are man-made materials, not found in nature, that exhibit unusual properties in the radio-, electromagnetic-, and optical-wave bands. The cells of these periodic MTM structures must be much smaller than the wavelength of the frequency of interest. In a MTM, the structure and dimensions of the design at the frequency of interest can produce negative values of permeability and/or permittivity, which define the electrical properties of the MTM. This study looks at various designs of absorbing layers presented in technical papers and verifies the results in simulations. Modifications are done to the existing designs to achieve good absorption level at the radar-frequency band of interest. Modeling and simulation are done in Microwave Studio by Computer Simulation Technology (CST). The S-parameters S11 (reflection coefficient) and S12 (transmission coefficient) are used to investigate the performance of the MTM as a radar-frequency absorber.
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Demetriadou, Angela. "Studies of metamaterial structures." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/11396.

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McMahan, Michael T. "Metamaterial absorbers for microwave detection." Thesis, Monterey, California: Naval Postgraduate School, 2015. http://hdl.handle.net/10945/45904.

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The development of high-power microwave weapons and dependence on electronics in modern weapon systems presents a high-power microwave weapons threat in future military conflicts. This study experimentally determines the absorption characteristics of simple metamaterial devices to potentially be used as protection and identification mechanisms, constructed through standard printed circuit board manufacturing processes, in the microwave region. Experimental results and analysis techniques are presented confirming absorption peaks in the anticipated microwave frequency range. The experimental results are compared to a finite-element model of these metamaterials confirming the ability to accurately model and predict absorption characteristics of similar metamaterial structures. Utilization of the absorption characteristics of these types of metamaterial structures to develop a microwave detector and/or equipment shielding is discussed. Several applications for such type of a detector are presented.
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Wang, Weijen 1980. "Directive antenna using metamaterial substrates." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/17995.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (p. 83-86).
Using a commercially available software(CST Microwave Studio®), two kinds of simulations have been carried out on different metamaterials in the microwave regime. One is transmission and reflection of a unit cell in a waveguide, and the other is parallel plate slab farfield radiation. The S-parameters are obtained from the wave-guide simulation and are used to retrieve the effective permittivity and permeability with which we can estimate the farfield radiation using analytic method. Thus, by comparing the farfield radiation from two different methods, analytic and slab simulation, we find that the analytic method is able to indicate many major features of the slab simulation's farfield results, implying that within a certain frequency range, we can treat the metamaterial as being homogeneous. After comparing the radiation performance of different metamaterial as antenna substrates, a structure is chosen to be optimized in such a way that it improves in radiation power, beamwidth, and bandwidth.
by Weijen Wang.
M.Eng.
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Hasan, Md Kamrul. "Metamaterial Antenna for Medical Applications." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367944880.

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Books on the topic "Metamaterial"

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Padilla, Willie J., and Kebin Fan. Metamaterial Electromagnetic Wave Absorbers. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-03765-8.

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Maasch, Matthias. Tunable Microwave Metamaterial Structures. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28179-7.

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Choudhury, Balamati, ed. Metamaterial Inspired Electromagnetic Applications. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3836-5.

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Tariqul Islam, Mohammad. Metamaterial for Microwave Applications. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003358152.

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Diest, Kenneth, ed. Numerical Methods for Metamaterial Design. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6664-8.

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Choudhury, Balamati, Arya Menon, and Rakesh Mohan Jha. Active Terahertz Metamaterial for Biomedical Applications. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-793-2.

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Nakano, Hisamatsu. Low-Profile Natural and Metamaterial Antennas. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118859704.

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Duan, Zhaoyun. Metamaterial-Based Electromagnetic Radiations and Applications. Singapore: Springer Nature Singapore, 2025. http://dx.doi.org/10.1007/978-981-97-8108-9.

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Narayan, Shiv, and Arun Kesavan, eds. Handbook of Metamaterial-Derived Frequency Selective Surfaces. Singapore: Springer Nature Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8597-5.

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Luo, Jun, Dong Wei, and Xinyu Zhang. Metamaterial-Based Optical and Radio Frequency Sensing. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2965-8.

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Book chapters on the topic "Metamaterial"

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Yang, Fu-Bao, and Ji-Ping Huang. "Diffusion Approximation and Metamaterial Design of Thermal Radiation." In Diffusionics, 217–31. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0487-3_12.

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AbstractIn recent years, there has been a growing interest in the design and application of metamaterials, especially in achieving unique physical properties.Transformation theory, as a powerful tool, has been actively employed not only in the realm of wave systems, such as electromagnetic waves but also in diffusion systems, including thermal diffusion, mass diffusion, and plasmonic diffusion.This chapter delves into the forefront of metamaterial design, emphasizing the significance of radiative heat transfer in this field and how the clever integration of transformation theory with the Rosseland diffusion approximation opens up innovative avenues for metamaterial design. We will also focus on novel approaches to achieving thermal camouflage, laying a solid foundation for future technological developments. Since the Rosseland diffusion approximation primarily addresses far-field problems, this article will further introduce a range of different types of metamaterials, covering near-field and far-field applications to cater to various domain-specific requirements. Special attention will be given to applications in radiative cooling and thermophotovoltaic systems, exploring how metamaterial design can enhance the performance of these systems. Finally, we will summarize the key findings of this article, encompassing other metamaterial designs relevant to radiative heat transfer and thermal conduction. We will also propose some promising directions for future research, offering a glimpse into the potential impact of metamaterials in the fields of science and engineering.
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Salvatore, Stefano. "Metamaterial Sensors." In Springer Theses, 71–76. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05332-5_8.

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Garg, Joohi. "Photonic Metamaterial." In Metamaterials Science and Technology, 1–11. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-13-0261-9_55-1.

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Vakula, D., and A. Sowjanaya. "Metamaterial Filters." In Metamaterials Science and Technology, 355–75. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6441-0_30.

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Vakula, D., and A. Sowjanaya. "Metamaterial Filters." In Metamaterials Science and Technology, 1–22. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-15-8597-5_30-1.

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Chipouline, Arkadi, and Franko Küppers. "Applications of the “Classical” Metamaterial Model—Disordered Metamaterials." In Optical Metamaterials: Qualitative Models, 145–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77520-3_7.

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Beech, Martin. "The Metamaterial Revolution." In The Physics of Invisibility, 131–87. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0616-7_5.

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Salvatore, Stefano. "Gyroid Metamaterial Fabrication." In Springer Theses, 19–29. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05332-5_3.

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Salvatore, Stefano. "Gyroid Metamaterial Characterization." In Springer Theses, 31–44. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05332-5_4.

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Garg, Joohi, and M. M. Sharma. "Microwave metamaterial absorbers." In Antennas for Industrial and Medical Applications with Optimization Techniques for Wireless Communication, 1–15. Boca Raton: CRC Press, 2024. https://doi.org/10.1201/9781003560487-1.

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Conference papers on the topic "Metamaterial"

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Ben-Haim, Danielle, and Tal Ellenbogen. "Dynamics of Second-Harmonic Generation in Bilayer Nonlinear Metamaterials." In CLEO: Fundamental Science, FTh1P.8. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_fs.2024.fth1p.8.

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We study the dynamics of second-harmonic generation from a nonlinear plasmonic metamaterial composed of two layers with geometric phase difference, as a foundation for designing efficient and tunable multilayered nonlinear metamaterials.
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Yoichi, Takumi, Uina Chiba, Rinpei Sasaki, Takeo Minari, Seigo Ohno, and Katsuhiko Miyamoto. "Terahertz spectroscopy and imaging of circular dichroism in chiral metasurfaces." In JSAP-Optica Joint Symposia, 18p_B2_14. Washington, D.C.: Optica Publishing Group, 2024. https://doi.org/10.1364/jsapo.2024.18p_b2_14.

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Optical metamaterial elements that break mirror symmetry, such as swastika-shaped lattice structures, have been shown to exhibit chirality in the terahertz (THz) region, which is due to the spiral character of their hierarchical three-dimensional structure. However, in ordinary THz imaging with a linearly polarized beam, it has been difficult to quantify chiral optical characteristics, limiting the ideal design of metamaterials.
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Zheludev, Nikolay I. "Metamaterial active matter." In Photonic and Phononic Properties of Engineered Nanostructures XV, edited by Ali Adibi, Shawn-Yu Lin, and Axel Scherer, 1. SPIE, 2025. https://doi.org/10.1117/12.3054233.

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Fesenko, Volodymyr, Oleksiy Shulika, and Vladimir R. Tuz. "Laguerre-Gaussian Beam Transmission through a Hyperbolic Metamaterial." In Latin America Optics and Photonics Conference, Tu5B.5. Washington, D.C.: Optica Publishing Group, 2024. https://doi.org/10.1364/laop.2024.tu5b.5.

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The interaction of a three-dimensional Laguerre-Gaussian beam with a hyperbolic metamaterial is considered. Conditions are found at which the Laguerre-Gaussian beam can be transmitted through the metamaterial almost without any distortion.
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Phoenix, Austin A., and Evan Wilson. "Variable Thermal Conductance Metamaterials for Passive or Active Thermal Management." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3767.

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To continue to meet spacecraft systems ever increasing thermal management requirements, new control methods need to be developed. While advances in metamaterials have provided the ability to generate materials with a broad range of material properties, relatively little advancement has been made in the development of adaptive metamaterials. This paper is focused on the development of a thermal management metamaterial that enables the active and passive control of a metamaterial’s thermal conductance. This variable conductivity is achieved through the application of internally or externally applied loads that induce internal contact resulting in changes in the conductive path length and the effective conductive area. This capability enables active or passive control of a metamaterial’s effective thermal conduction through the application of mechanical and thermal strain. Passively applied thermal strains can be used to design a highly nonlinear material thermal conductivity as a function of temperature. Actively, this can be used to precisely control the temperature of an interface through dynamically changing the instantaneous heat flux through the metamaterial. This work expands on the field of thermal switches by enabling a non-binary configuration where the initial air gap is slowly closed as contact sequentially introduced into the metamaterial. As internally or externally developed loading is applied, contact is introduced with an increasing contact area until full contact is achieved. This intermediate step of partial contact enables unique design capabilities that enable highly nonlinear thermal conductivity as a function of temperature as well as stability regions that allow passive thermal control. An example metamaterial was developed and evaluated to quantify the potential of this concept. The specific metamaterial configuration assessed in this paper uses offset flat and curved copper plates that are connected at the edges of the plate using a low conductivity epoxy. To evaluate the metamaterial performance, the stiffness and thermal conductivity are calculated as a function of the resulting contact area and the required applied loading. This work is focused on determining the potential of this metamaterial concept by evaluating this initial concept confirmation to establish the magnitude of the thermal conductance change, and the design of the conductivity change a function of applied loading.
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Tanaka, Takuo. "Metamaterial absorbers and their applications." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.8a_a409_4.

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Recent advances in metamaterials enable us to create unprecedented optical materials, and as a example of such materials, perfect absorptive material surfaces within a certain frequency range were demonstrated. Since the metamaterial absorber offers a unique surface condition with tailored absorption properties, a wide variety of potential applications have been proposed.
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Yang, Yunfang, and Zhong You. "3D Construction of a Tilted Cuboid Mechanical Metamaterial." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87050.

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Functional metamaterials are gradually becoming the frontier of scientific research and industrial applications. Among them, reconfigurable mechanical metamaterial with inbuilt motion capability could result in unusual physical properties such as shape tunability and programmable density and stiffness. Inspired by the transformable cuboid structure that was first investigated by Ron Resch, we proposed a tilted cuboid structure that can fold into a 3D configuration. By designing the individual building units, face angles and tessellation pattern, we are able to construct a series of reconfigurable structures with various shape, twist and permeability feature. Based on our approach, a configuration method to build multi-layer metamaterial is proposed, and it can be generalized to other tilted structures with different building units. The volumetric strains of different models are analyzed, and the result shows the metamaterial has a massive deformation ability as the maximum volume can be four times of the packaged volume. The tilted cuboid structure is highly flexible with variable stiffness and permeability, and can be used to develop metamaterials, large deformation devices and kinetic architectures.
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Xu, Zifu, Longqiu Li, and Jiaxin Li. "Two-Phase Thermal Metamaterial." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22158.

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Abstract The capability of thermal metamaterials is required from single function to multifunction under different external heat conditions. The methods to develop thermal materials by simple structural transformations have been explored. While, the components of traditional thermal metamaterial are mainly set as solid materials, which is difficult to change the composition of materials, such as recombing and fixing the spatial position of material, because of material rigidity. Therefore, the potential of thermal materials is limited. Liquid has fluidity in spatial structure, for which the efficient combination of solid-liquid materials provides an avenue for dynamically modeling thermal field. Herein, we propose the concept of two-phase thermal metamaterial, which is switchable by microscale elements. On one side, we develop a switchable thermal meta-unit manipulated by micro-element under the gradient field and explore the process of heat transfer by focusing on radiation and conduction under translucent media condition. Otherwise, we propose a method to achieve a non-reciprocal heat transfer system by the design of two-phase media. The propose of two-phase thermal metamaterials set a general background for a variety of applications for complex conditions.
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Rodrigues, Gustavo Simão, Hans Ingo Weber, and Larissa Driemeier. "Elastic Metamaterial Design to Filter Harmonic Mechanical Wave Propagation." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87753.

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The metamaterial concept was first oriented to electromagnetic field applications and the main objectives were to develop materials with peculiar properties such as negative dielectric constant, negative magnetic permeability and negative refraction index. Gradually, other areas started using parameters that do not exist in the materials found in nature and, classifying them as metamaterials. So, areas such as acoustics, optics and mechanics opened up space for applications of this innovative “material”. Many efforts for an adequate modeling were made searching also for all kinds of possible applications. One example of application in optics is the use of conformal transformation to design devices with new functionalities from non-homogeneous isotropic dielectric media. The mirages created in the desert are the result of these non-homogeneities. These studies are supposed being helpful to develop invisible cloaks using metamaterials. The present work deals with elastic metamaterial application in mechanical engineering. It is well knowing that metamaterials are able to filter harmonic wave propagation and many works present this capability caused by a bandgap that appears in some range of frequency due to the system’s features. However, it is not very clear how the parameters used for the metamaterials design should be defined. The purpose of this work is to propose a methodology to design an optimized metamaterial component to filter the mechanical wave propagation in a finite chain of masses. It is also in the scope of this work to analyze the borders of the bandgap of the studied chain of masses and how the propagated wave is attenuated along this region.
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Wang, Zihan, Ran Zhuang, Weikang Xian, Jiawei Tian, Ying Li, Shikui Chen, and Hongyi Xu. "Phononic Metamaterial Design via Transfer Learning-Based Topology Optimization Framework." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89932.

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Abstract Phononic metamaterials are widely used to attenuate wave propagation. However, designing the structure of phononic metamaterial remains a challenge. In this work, we proposed a transfer learning-based design framework to accelerate the design of phononic metamaterials with wide bandgaps. First, we establish a transfer learning model with convolutional layers. This model leverages the knowledge learned from the structure-elasticity dataset to predict the structure-phononic property relationship. We demonstrate that the transfer learning model achieves good prediction accuracy with limited training data. We also discuss the feasibility of using the structure-elasticity model to benefit the design optimization of phononic metamaterials. Then we propose a transfer learning-based design framework for the topology optimization of cellular metamaterial for optimal phononic properties (bandgap width). Parametric optimization is conducted to find the optimal structure features that lead to the widest bandgap. The structure features are represented by an embedding layer shared by the structure-elasticity and the structure-phononic property models. Next, the corresponding elastic stiffness constants are obtained via the structure-elasticity model. Then topology optimization is employed to generate the metamaterial structural images corresponding to the target elastic stiffness constant values. The effectiveness of the proposed design framework is validated by comparing the performances of design candidates with existing designs.
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Reports on the topic "Metamaterial"

1

Stinson, Eric A. Metamaterial Resonant Absorbers for Terahertz Sensing. Fort Belvoir, VA: Defense Technical Information Center, December 2015. http://dx.doi.org/10.21236/ad1009293.

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Andreev, Andrey D., and Kyle J. Hendricks. Metamaterial Cathodes in Multi-Cavity Magnetrons (Postprint). Fort Belvoir, VA: Defense Technical Information Center, April 2011. http://dx.doi.org/10.21236/ada599592.

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Lee, Youn M. A Test Plan to Measure Metamaterial Performances. Fort Belvoir, VA: Defense Technical Information Center, September 2011. http://dx.doi.org/10.21236/ada551770.

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Krushynska, Anastasiia, Igor Zhilyaev, Nitesh Anerao, Cihat Yilmaz, and Mostafa Ranjbar. 3D-Printed Flexible Wings With Metamaterial Functionalities. Peeref, September 2022. http://dx.doi.org/10.54985/peeref.2209p3789644.

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Le-Wei Li, Joshua. A Broadband and High Gain Metamaterial Microstrip Antenna. Fort Belvoir, VA: Defense Technical Information Center, May 2010. http://dx.doi.org/10.21236/ada523535.

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Sipus, Zvonimir, Dario Bojanjac, Branimir Ivsic, and Tim Komljenovic. Metamaterial-Based Cylinders Used for Invisible Cloak Realization. Fort Belvoir, VA: Defense Technical Information Center, August 2011. http://dx.doi.org/10.21236/ada555070.

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Hoorfar, Ahmad, John McVay, Jinhui Zhu, and Hui Huang. Novel Electrically Small Antennas and Metamaterial High Impedance Surfaces. Fort Belvoir, VA: Defense Technical Information Center, December 2005. http://dx.doi.org/10.21236/ada441484.

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Yellowhair, Julius E., Hoyeong Kwon, Andrea Alu, Robert L. Jarecki, and Subhash L. Shinde. Metamaterial Receivers for High Efficiency Concentrated Solar Energy Conversion. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1431481.

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Zhou, Weimin, Gerard Dang, Monica Taysing-Lara, Grace Metcalfe, Nathaniel Woodward, Amir Zaghloul, Daniel Shreiber, Melanie Cole, Eric Ngo, and Matt Ivill. Metamaterial and Metastructural Architectures for Novel C4ISR Devices and Sensors. Fort Belvoir, VA: Defense Technical Information Center, March 2015. http://dx.doi.org/10.21236/ada614390.

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Mosallaei, Hossein. Realization of Metamaterial-Based Devices: Mathematical Theory and Physical Demonstration. Fort Belvoir, VA: Defense Technical Information Center, February 2010. http://dx.doi.org/10.21236/ada515521.

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