Article
Green & Sustainable Science & Technology
Zhen Zou, Fengxiang Xu, Yuxiong Pan, Xiaoqiang Niu, Tengyuan Fang, Chao Zeng
Summary: This paper investigates the effects of unit cell arrangement, material, and geometry on the bandgap properties of pentamode metamaterial (PM) using the finite element method (FEM). The results show that the PM with triangular cell arrangement has better bandgap properties. The effects of material and geometry on bandgap properties are thoroughly explored, and the regulation mechanism of bandgap properties is discussed. Multi-objective optimization is conducted to enhance the bandgap properties of PM, resulting in significant improvements.
Article
Physics, Condensed Matter
Yan Huang, Xiaozhe Zhang, Lili Zhang, Chengxin Cai
Summary: This paper investigates a special type of pentamode metamaterial composed of double-cone elements in a simple cubic lattice. The phonon band structure and transmission spectrum are calculated using the finite element method to theoretically verify its pentamodal behavior. Results show a wide single-mode band gap in the phonon band structure, with a bulk modulus to shear modulus ratio exceeding 300. The metamaterial demonstrates excellent pentamodal characteristics and complies with the mathematical definition of 'pentamode'.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Nanoscience & Nanotechnology
O. Florez, G. Arregui, M. Albrechtsen, R. C. Ng, J. Gomis-Bresco, S. Stobbe, C. M. Sotomayor-Torres, P. D. Garcia
Summary: Nanopatterned materials have the capability to control mechanical vibrations and enable the suppression of vibrations and propagation of hypersonic guided modes at room temperature. The structuring of solids to possess a phononic stop band can eliminate thermal vibrations. Experimental results demonstrate that the shamrock crystal geometry on a nanostructured silicon membrane can efficiently manipulate phonons, with potential applications in optomechanics and signal processing transduction.
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Yan Huang, Xiaozhe Zhang, Haifeng Li, Chengxin Cai
Summary: The core-shell pentamode metamaterial outperforms the traditional non-core-shell structure in terms of mechanical properties and single-mode band gap, with broader mechanical response and higher sensitivity. The size of the core-double-cone and the Young's modulus of the core material play important roles in achieving a single-mode band gap with lower frequency and wider bandwidth.
Article
Physics, Fluids & Plasmas
Geun Ju Jeon, Joo Hwan Oh
Summary: Acoustic frequency conversion, an important nonlinear wave phenomenon, has been actively researched recently for its applications in acoustic nondestructive evaluation and directional speakers. Efficiency of acoustic frequency conversion is relatively low due to small amplitudes and undesired intermodulation. By using an acoustic metamaterial, efficient frequency down-conversion can be achieved by reducing effective speed of sound and suppressing undesired intermodulation.
Article
Physics, Applied
Chengxin Cai, Guangchen He, Yuhang Yin, Yao Qin, Huanyang Chen
Summary: In this study, a pentamode metamaterial plate with topological characteristics is designed. The organization of pentamode metamaterial structural elements leads to the achievement of topological boundary states, which effectively protect the propagation of elastic waves. Additionally, a macro-scale specimen is fabricated using additive manufacturing and a polymer based on the numerical simulation model. The vibrational response of the sample confirms its topological attributes in controlling elastic wave transmission. This discovery paves the way for a novel approach to manipulating acoustic/elastic waves using pentamode metamaterials.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Myung Hwan Bae, Wonjae Choi, Jong Moon Ha, Miso Kim, Hong Min Seung
Summary: In this study, we proposed a metamaterial that can achieve wave localization at extremely low frequencies. By imposing a normal defect and introducing a spiral cavity, the resonating frequency can be tuned and wave localization can be achieved.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Zhen Zou, Fengxiang Xu, Yuxiong Pan, Tengyuan Fang
Summary: In this paper, novel curve Pentamode metamaterials (PMs) are proposed to enhance their acoustic modulation capability. Different unit cell arrangements of elliptic PMs (EPMs) are designed and the EPM with hexagonal unit cells exhibits the best bandgap properties. Sinusoidal and power curves are introduced into the EPMH to enhance the bandgap properties, and the improvement using power curves is found to be the highest. A high accuracy Kriging model is constructed to optimize the EPMH, resulting in significant increases in the bandwidths of phononic bandgap and single mode bandgap compared to conventional PMs. This study provides a new strategy for designing PMs with excellent bandgap properties.
Article
Physics, Multidisciplinary
Yi Chen, Ke Wang, Muamer Kadic, Sebastien Guenneau, Changguo Wang, Martin Wegener
Summary: Previous theory and experiment have shown that introducing strong nonlocal interactions in addition to local interactions into metamaterials can lead to unusual wave dispersion relations. In this study, the authors investigate the frequency-dependent acoustical phonon transmission in a slab of nonlocal metamaterial. They find a series of bound states in the continuum and sharp transmission resonances next to sharp transmission minima. The findings are validated by numerical calculations on three-dimensional metamaterial microstructures.
COMMUNICATIONS PHYSICS
(2023)
Article
Multidisciplinary Sciences
Martin R. Otto, Jan-Hendrik Pohls, Laurent P. Rene de Cotret, Mark J. Stern, Mark Sutton, Bradley J. Siwick
Summary: This study investigates the electron-phonon coupling phenomena in 1T-TiSe2 using ultrafast electron diffuse scattering, distinguishing the contributions to phonon softening from different mechanisms. By selectively photo-doping carriers into the electron pocket, the researchers observe specific renormalization of soft zone-boundary phonon frequencies followed by electron-phonon equilibration.
Article
Mechanics
Dongliang Guo, Shan Jiang, Yunlei Zhou, Lei Zhang, Kan Li, Bo Song, YongAn Huang
Summary: This study proposes a novel sandwich pentamode metamaterials (PMs) with ultrahigh compression-shear ratios, which improves the ratio without sacrificing the crucial size. Finite element analysis and experimental results verify its validity, and the influence of single-layer and multi-layer sandwich lattices are further investigated. This study breaks through the limitations of limited compression-shear ratio, extreme crucial size, and high-cost fabrication, promoting the practical application of PMs.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Krzysztof K. Dudek, Julio A. Iglesias A. Martinez, Gwenn Ulliac, Laurent Hirsinger, Lianchao Wang, Vincent Laude, Muamer Kadic
Summary: A novel micro-scale mechanical metamaterial is proposed that can significantly change its mechanical and wave propagation properties without rebuilding the structure. The reconfiguration process can be induced and controlled remotely through the application of a magnetic field using appropriately distributed magnetic inclusions.
ADVANCED MATERIALS
(2023)
Article
Instruments & Instrumentation
Elkenany. B. Elkenany
Summary: The dependence of electronic band structure, optical phonon frequencies, acoustic velocities, and mechanical properties of InP1-xSbx alloys on temperature and pressure were analyzed in this study. The virtual crystal approximation (VCA) with the compositional disorder effect (CDE) was considered. Results showed good agreement with published values and may serve as reference for experimental work, providing insights for optoelectronic applications.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xueyan Chen, Qingxiang Ji, Julio Andres Iglesias Martinez, Huifeng Tan, Gwenn Ulliac, Vincent Laude, Muamer Kadic
Summary: Simple-cubic closed tubular lattice exhibits high mechanical properties and irregular stable post-yield response, with limited loading direction dependence. It has significantly larger elastic modulus and yield strength compared to simple-cubic truss lattice, and can absorb more energy with higher efficiency.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Crystallography
Jingxuan Zhou, Jie Zhang, Jiahui Chang, Zheng-Yang Li, Dongjia Yan
Summary: Phononic crystals and metamaterials possess topologically protected surface states, which can guide elastic waves without scattering or energy losses. In the field of acoustics, topological insulators show promise in designing efficient and robust acoustic wave guides. This study proposes a novel design of hexagonal metamaterial plates that can generate topologically protected edge waves through active control. The numerical examples demonstrate the robustness and efficiency of the proposed design.
Article
Engineering, Aerospace
Qingxiang Ji, Xueyan Chen, Vincent Laude, Jun Liang, Guodong Fang, Changguo Wang, Rasoul Alaee, Muamer Kadic
Summary: Infrared camouflage based on artificial thermal metasurfaces has become a hot topic recently. It aims to hide specific objects from infrared detection by eliminating the thermal radiation differences between the object and the background. This article presents a simple and practicable design for infrared stealth using a multilayer film, which offers advantages in scalability, flexible fabrication, and structural simplicity. The multilayer medium consists of a silicon substrate, carbon layer, and zinc sulfide film, and its optical properties are determined using the transfer matrix method. By locally changing the thickness of the coating film, the spatial tunability and continuity in thermal emission are demonstrated, achieving thermal camouflage functionality. Moreover, thickness-engineered multilayer films also demonstrate other functionalities such as thermal illusion and thermal coding.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Chemistry, Multidisciplinary
Yi Chen, Mahmoud A. A. Abouelatta, Ke Wang, Muamer Kadic, Martin Wegener
Summary: Introduces reconfigurable plug-and-play electromagnetic metamaterials, where the building blocks are standard bayonet Neill-Concelman (BNC) connectors and the effective properties are achieved by tailoring local and nonlocal interactions mediated by standard coaxial cables. Demonstrates unprecedented dispersion relations with multiple regions of slow waves and backward waves in the lowest band. Importantly, the dispersion relation of such metamaterials is not limited by causality as in the case of local resonances.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ramin Hamzehei, Mahdi Bodaghi, Julio Andres Iglesias Martinez, Qingxiang Ji, Gwenn Ulliac, Muamer Kadic, Changguo Wang, Ali Zolfagharian, Nan Wu
Summary: This article proposes a novel bioinspired friction-based mechanical metamaterial, inspired by parrot's beaks, that exhibits a zero Poisson's ratio behavior. The mechanical performances of the metamaterials are studied at both macro and micro scales through experiments and finite element analysis, demonstrating their energy absorption and dissipation features.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Krzysztof K. Dudek, Julio A. Iglesias A. Martinez, Gwenn Ulliac, Laurent Hirsinger, Lianchao Wang, Vincent Laude, Muamer Kadic
Summary: A novel micro-scale mechanical metamaterial is proposed that can significantly change its mechanical and wave propagation properties without rebuilding the structure. The reconfiguration process can be induced and controlled remotely through the application of a magnetic field using appropriately distributed magnetic inclusions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Michael Fidelis Gross, Jonathan Ludwig Guenter Schneider, Yu Wei, Yi Chen, Sebastian Kalt, Muamer Kadic, Xiaoning Liu, Genkai Hu, Martin Wegener
Summary: In classical Cauchy elasticity, 3D materials have six eigenmodes of deformation. Extremal elastic materials are classified based on the number of easy eigenmodes out of these six, leading to hexamode (N=6), pentamode (N=5), tetramode (N=4), trimode (N=3), dimode (N=2), and monomode (N=1) materials. Pentamode metamaterials have attracted significant attention, and in this study, microstructured 3D polymer-based tetramode metamaterials were designed, characterized, and compared to theoretical expectations. The potential application as a compact and broadband polarizer for acoustical phonons at ultrasound frequencies was demonstrated.
ADVANCED MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Adria Grabulosa, Johnny Moughames, Xavier Porte, Muamer Kadic, Daniel Brunner
Summary: Continued miniaturization in electronic integrated circuits has reached its limit, while communication energy consumption has become the dominant limitation. To address this, we have developed a fabrication process for three-dimensional photonic integration using additive photo-induced polymerization. This allows for the printing of photonic waveguides and their stable integration on standard semiconductor samples.
Article
Multidisciplinary Sciences
Qingxiang Ji, Zhiming Xue, Zaoxu Zhang, Zhanbo Cui, Muamer Kadic, Changguo Wang
Summary: Twisted bilayer graphene demonstrates extraordinary optical and electrical characteristics due to interlayer interactions. Inhomogeneous interlayer deformations caused by strong van der Waals interactions at the interface change the graphene's physical properties. The deformation behavior of twisting a graphene flake over a rigid graphene substrate is studied using theoretical and numerical models. The influences of in-plane deformations are significant at small-twist-angles.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Physics, Multidisciplinary
Richard Craster, Sebastien Guenneau, Muamer Kadic, Martin Wegener
Summary: Mechanical metamaterials, designed composites with elastic behaviors and effective mechanical properties beyond those of their individual ingredients, have made significant progress in the last decade due to advances in computational science and manufacturing. This review provides a tutorial on its mathematical basis and summarizes the state-of-the-art in both conceptual and experimental aspects.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Yi Chen, Ke Wang, Muamer Kadic, Sebastien Guenneau, Changguo Wang, Martin Wegener
Summary: Previous theory and experiment have shown that introducing strong nonlocal interactions in addition to local interactions into metamaterials can lead to unusual wave dispersion relations. In this study, the authors investigate the frequency-dependent acoustical phonon transmission in a slab of nonlocal metamaterial. They find a series of bound states in the continuum and sharp transmission resonances next to sharp transmission minima. The findings are validated by numerical calculations on three-dimensional metamaterial microstructures.
COMMUNICATIONS PHYSICS
(2023)
Article
Engineering, Mechanical
Ke Wang, Yi Chen, Muamer Kadic, Changguo Wang, Martin Wegener
Summary: In our previous work, we have demonstrated the presence of roton-like dispersion relations in acoustic metamaterials with nonlocal interactions, similar to superfluid Helium-4. However, this effect was observed only for specific sound propagation directions. In this study, we designed a three-dimensional cubic-symmetry airborne acoustic metamaterial that exhibits roton-like behavior along all three orthogonal directions, albeit with significant anisotropy. Our numerical calculations, in good agreement with a simplified analytical model, indicate that experimental validation is possible but challenging due to the complex and dense three-dimensional network of acoustic channels required.
ACTA MECHANICA SINICA
(2023)
Article
Mechanics
K. K. Dudek, L. Mizzi, J. A. Iglesias Martinez, A. Spaggiari, G. Ulliac, R. Gatt, J. N. Grima, V. Laude, M. Kadic
Summary: The ability to control Poisson's ratio of functional materials is essential for the development of efficient structures in various fields. This study proposes novel microscopic 2D and 3D functionally-graded mechanical metamaterials that can exhibit a wide range of Poisson's ratio depending on their composition. The research also explores the dynamic properties of these structures, specifically how the variation in composition affects wave propagation velocity. This has significant implications for applications involving wave attenuation or sensors.
COMPOSITE STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Lianchao Wang, Julio A. Iglesias Martinez, Gwenn Ulliac, Bing Wang, Vincent Laude, Muamer Kadic
Summary: In this paper, a model for non-reciprocal and non-Newtonian mechanical metamaterials is demonstrated by combining the concept of local resonances and fixing boundaries. Via computational models and impact experiments, the authors show that stiffness substantially changes as a function of the loading velocity.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hammou Oubeniz, Abdelhaq Belkacem, Hicham Mangach, Muamer Kadic, Abdenbi Bouzid, Younes Achaoui
Summary: This paper explores the applications of the dispersive feature of metals in plasmonics, as well as the impact of scaling parameters on transmission and absorption properties. By comparing the analytical RCWA with the numerical FEM, the underlying mechanisms of these phenomena are revealed.
Article
Chemistry, Physical
Abdelhaq Belkacem, Hammou Oubeniz, Hicham Mangach, Muamer Kadic, Noureddine Cherkaoui Eddeqaqi, Abdenbi Bouzid, Younes Achaoui
Summary: This paper investigates the mechanisms of enhancing optical waves through perforated plates and explores the coupling potential between different materials. It is found that optimized geometrical parameters can create controllable band gaps for optical waves.
Article
Automation & Control Systems
Weinan Gao, Jingtian Kang, Guohui Wang, Haoxiang Ma, Xueyan Chen, Muamer Kadic, Vincent Laude, Huifeng Tan, Yifan Wang
Summary: A design of soft pneumatic actuators with structured fabrics as actuator skins is proposed, enabling multiple deformations and high bending stiffness variation. The developed actuators show adjustable bending stiffness and comparable blocking force to conventional fabric-reinforced pneumatic actuators. The actuators are used to construct a bionic soft gripper with multiple degrees of freedom, capable of lifting weights up to 1 kg and grasping objects of various sizes.
ADVANCED INTELLIGENT SYSTEMS
(2023)
