Article
Chemistry, Physical
Kevin Vynck, Romain Pacanowski, Adrian Agreda, Arthur Dufay, Xavier Granier, Philippe Lalanne
Summary: “Nanostructured materials have emerged as a promising approach for material appearance design, focusing on creating structural colors by wave interference. However, other important aspects of an object's visual appearance have been neglected. In this study, a multiscale modeling platform was developed to predict the visual effects of macroscopic objects covered by disordered optical metasurfaces. By utilizing nanoscale resonances and mesoscale interferences, unique visual effects were created at the macroscale. This framework opens up new possibilities in fine and applied visual arts.”
Article
Materials Science, Multidisciplinary
Ivan Shutsko, Maximilian Buchmueller, Maik Meudt, Patrick Goerrn
Summary: Disordered hyperuniformity (DHU) is a significant manifestation of engineered disorder aiming to overcome limitations related to order. A novel and facile method for the fabrication of DHU metasurfaces is proposed, which allows for in-situ control of the k-space by illuminating the growing metasurface with light. The experimental confirmation of anisotropic stealthy DHU is achieved through light-controlled growth.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: This study presents a modal-based tool that explains the appearance of disordered monolayers of resonant meta atoms. It shows that the combination of plasmonic and Fabry-Perot resonances creates unique iridescent visual effects different from those observed in natural nanostructures or thin-film interferences.
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: The paper presents a modal-based tool that can accurately analyze the physical mechanisms and features of colloidal disordered monolayers, and investigates the unique iridescent visual appearances created by the combination of plasmonic and Fabry-Perot resonances.
Article
Nanoscience & Nanotechnology
Shulei Li, Mingcheng Panmai, Shaolong Tie, Yi Xu, Jin Xiang, Sheng Lan
Summary: Metasurfaces made of metallic nanoparticles can manipulate electromagnetic waves. A new strategy using femtosecond laser pulses to regulate disordered plasmonic nanoparticles into nanogratings has been proposed, enabling high spatial resolution and good chromacity in polarization sensitive optical memory and color display.
Article
Optics
Peng Mao, Changxu Liu, Xiyan Li, Mengxia Liu, Qiang Chen, Min Han, Stefan A. Maier, Edward H. Sargent, Shuang Zhang
Summary: Total internal reflection is important for applications like fiber optics, but not ideal for LEDs. Recent advances in material science have improved light extraction efficiency, but fabrication of geometrical features for extraction remains a challenge. A new disordered metasurface design allows for simple fabrication and improved LED efficiency.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Physics, Applied
A. Mourad, L. Burgnies, E. Lheurette
Summary: The Pattern Search (PS) optimization algorithm was used to design disordered coding metasurfaces for the reduction of both monostatic and bistatic Radar Cross Section (RCS) in the 26-40 GHz frequency range. High and low phase-state unit-cells were defined to minimize coupling between elementary patterns, resulting in a quasi-constant 180(degrees) phase difference over a broad frequency range. Experimentally, -10 dB monostatic RCS reduction over a relative frequency band broader than 35% was achieved, which agreed well with simulated and theoretical predictions. This highlights the importance of disordered coded patterns for RCS reduction and the effectiveness of the PS optimization approach in designing coding metasurfaces.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Ji-an Chen, Yuyuan Qin, Yubiao Niu, Peng Mao, Fengqi Song, Richard E. Palmer, Guanghou Wang, Shuang Zhang, Min Han
Summary: We demonstrate a new type of disordered metasurface by densely packing plasmonic nanoclusters of ultrasmall size on a planar optical cavity. The system operates as a broadband absorber or offers a reconfigurable absorption band across the visible region, resulting in continuous wavelength-tunable photothermal conversion. We also present a method to measure the temperature of plasmonic metasurfaces via surface-enhanced Raman spectroscopy (SERS) by incorporating single-walled carbon nanotubes (SWCNTs) as an SERS probe within the metasurfaces. Our disordered plasmonic system generated by a bottom-up process offers excellent performance and compatibility with efficient photothermal conversion. Moreover, it provides a novel platform for various hot-electron and energy-harvesting functionalities.
Review
Physics, Multidisciplinary
Zixian Hu, Changxu Liu, Guixin Li
Summary: Metasurfaces, the planar version of artificial structured media at sub-wavelength scale, provide unprecedented capabilities in manipulating light waves. They have a wide range of applications in holography, imaging, optical communication, nonlinear light source, and quantum computing. This article reviews the mechanisms, characteristics, and applications of disordered metasurfaces, and discusses their potential as a promising alternative to ordered ones.
ADVANCES IN PHYSICS-X
(2023)
Article
Acoustics
A. Palermo, B. Yousefzadeh, C. Daraio, A. Marzani
Summary: This study investigates the propagation of Rayleigh waves in a half-space coupled to a nonlinear metasurface, analyzing the effects of nonlinear interaction force and energy loss on wave dispersion. The research presents closed-form expressions to predict the dispersive characteristics of nonlinear Rayleigh waves, demonstrating how different types of nonlinearity affect spectral gaps in the metasurface and revealing spatial gaps induced by softening nonlinearity in dispersion curves.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
Yifei Xu, Zhigang Cao, Kemeng Cui, Yuanqiang Cai, Xingbo Pu
Summary: In this study, an original analytical formulation is proposed to investigate the interaction between seismic Love waves and a metasurface composed of tunable anti-plane resonators. The formulation utilizes the Green's function to describe the incident and scattered fields and derives a dispersion relation for hybrid Love waves using the effective medium approximation. The capabilities of the analytical formulation are demonstrated through modeling Love waves propagating across resonators, revealing complex phenomena and hybridization features.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Physics, Multidisciplinary
Yabin Jin, Yan Pennec, Bernard Bonello, Hossein Honarvar, Leonard Dobrzynski, Bahram Djafari-Rouhani, Mahmoud Hussein
Summary: The introduction of engineered resonance phenomena on surfaces has created a new frontier in surface science and technology, with pillared phononic crystals, metamaterials, and metasurfaces representing an emerging class of artificial structured media. The placement of pillars on surfaces has provided new avenues for controlling and manipulating wave propagation, with applications spanning multiple disciplines in applied physics and engineering.
REPORTS ON PROGRESS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Aleksandr I. Gusev
Summary: For the first time, the elastic constants of ZrCy zirconium carbide are determined as functions of the carbon content y. The elastic stiffness constants of disordered ZrCy carbide decrease with the defectiveness of the carbon sublattice. An increase in the deviation from stoichiometry results in a slight decrease in elastic anisotropy. The Vickers hardness and Debye temperature of polycrystalline ZrCy carbide increase nonlinearly with increasing carbon content y.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Engineering, Civil
Yabin Hu, Meizhen Li, Hongbo Liu, Bing Li
Summary: As an innovative planar artificial structure, elastic metasurface shows great potential in vibration and noise control. It has superior performance in compact/ultra-thin configuration, easy fabrication, and richer physics, which make up for the deficiency of traditional metamaterials. Achieving broadband exotic elastic-wave manipulations using metasurfaces is highly desired.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Xudong He, Hao-Wen Dong, Zhiwen Ren, Sheng-Dong Zhao, Kai Wang, Yuan Hu, Ping Xiang, Ying Li, Mingji Chen, Daining Fang
Summary: During the past decade, passive metasurfaces have attracted great interest in the fields of electromagnetic and acoustic wave for generating vortex beams. However, in the underwater environment, elastic metasurfaces with wide bandwidth face challenges due to fluid-solid interaction and impedance matching. To overcome this, an inverse-design strategy is proposed to construct a single-phase underwater metasurface that converts incident plane waves into vortex beams with high transmission. Numerical and experimental demonstrations show the acoustic functionality of this metasurface. It opens up opportunities for underwater acoustic communication.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Feng Liu, Zhichun Yang, Pengtao Shi, Yizhou Shen, Liyun Cao, Yanlong Xu
Summary: This paper proposes an ultra-broadband achromatic meta-slab (UAM) that achieves an unchanged refraction angle for incident frequencies. By utilizing subunits with gradient thickness, the UAM overcomes the issue of chromatic aberration. Experimental results demonstrate that the UAM maintains achromaticity across multiple frequencies, making it suitable for various applications such as vibration control, vibrational energy harvesting, and health monitoring.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Tian Zhao, Zhichun Yang, Wei Tian, Liyun Cao, Yanlong Xu
Summary: This research proposes a new design of deep-subwavelength elastic metasurface composed of gradient force-moment resonators for abnormal reflection of flexural waves. The theoretical analysis and simulations demonstrate the effectiveness of the proposed metasurface, which has potential applications in vibration control, wave absorption, and energy harvesting.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Yi Zeng, Liyun Cao, Sheng Wan, Tong Guo, Yan-Feng Wang, Qiu-Jiao Du, Badreddine Assouar, Yue-Sheng Wang
Summary: Seismic metamaterials have received significant attention in the past two decades due to their ability to control seismic surface waves. In this study, a new type of seismic metamaterial with a low-frequency bandgap induced by inertial amplification is proposed to isolate seismic surface waves. Experimental results using a metamaterial plate composed of 25 unit cells demonstrate the characteristics of the bandgap induced by inertial amplification. The imaging of flexural waves by a scanning laser Doppler vibrometer shows strong attenuation effects in the bandgap caused by the metamaterial plate. The broadband attenuation is investigated using two different types of unit cells. Finally, similar structures with inertial amplification are introduced to design seismic metamaterials for isolating seismic surface waves at low frequencies.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Physics, Applied
Sheng Wan, Liyun Cao, Yi Zeng, Tong Guo, Mourad Oudich, Badreddine Assouar
Summary: This letter introduces a compact low-frequency non-reciprocal metamaterial design for flexural waves. The non-reciprocal wave propagation is achieved by modulating the stiffness of the resonators and introducing a phase shift.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Yi Zeng, Liyun Cao, Sheng Wan, Tong Guo, Shuowei An, Yan-Feng Wang, Qiu-Jiao Du, Brice Vincent, Yue-Sheng Wang, Badreddine Assouar
Summary: This letter introduces a seismic metamaterial with an ultra-low frequency bandgap induced by inertial amplification. Numerical and experimental results demonstrate that the proposed metamaterial can effectively isolate seismic surface waves. Additionally, an embedded inertial amplification mechanism is introduced on a soil substrate to design a seismic metamaterial capable of attenuating seismic waves around 4Hz.
APPLIED PHYSICS LETTERS
(2022)
Article
Acoustics
Yanlong Xu, Yizhou Shen, Feng Liu, Liyun Cao, Zhichun Yang
Summary: This study investigates the flexural edge wave (FEW) on a semi-infinite isotropic elastic thin plate with a structured free edge. The dispersion relation of the modulated FEW is analytically solved by using the coupled mode theory, and the propagation characteristics of different modulated FEW modes are discussed. Numerical and experimental results demonstrate the rainbow trapping of the first-order modulated FEW and the mode conversion of the second-order modulated FEW to the bulk wave.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Multidisciplinary
Liyun Cao, Yifan Zhu, Sheng Wan, Yi Zeng, Badreddine Assouar
Summary: This study presents a non-Hermitian loss-modulation beam and plate model based on complex wavenumber plane for designing lossy elastic metamaterials. The high-performance absorption of the metamaterial is achieved through a combination of dissipation-radiation balance and multiple reflections. The study provides a new approach for broadband low-frequency vibration suppression and offers an effective paradigm for wave engineering in non-Hermitian elastic wave systems.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Physics, Applied
Zihao Su, Hao Luo, Siyuan Gao, Zhitao Luo, Yifan Zhu, Hui Zhang
Summary: Conventional acoustic metamaterial barriers are used for sound insulation over a continuous broad bandwidth, but in practical scenarios, noise signals from complex sources often have discrete peaks or valleys. A customizable acoustic metamaterial barrier (CAMB) is proposed to achieve selective sound insulation at desired frequencies while allowing effective signal transmission at others. The CAMB consists of a Helmholtz resonator (HR) and a microperforated panel (MPP) for controlling sound insulation at low and high frequencies, respectively.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Xudong Fan, Yifan Zhu, Zihao Su, Ning Li, Xiaolong Huang, Yang Kang, Can Li, Chunsheng Weng, Hui Zhang, Bin Liang, Badreddine Assouar
Summary: A novel reconfigurable acoustic metascreen is proposed for broadband manipulations of transmitted acoustic waves. The metascreen consists of uniquely designed unit cells that can modulate the transmitted phase shift within the full 2pi range and have excellent impedance matching with the background medium. By arranging the reconfigurable elements, different phenomena and functionalities, such as acoustic focusing and acoustic bending, can be easily realized. Numerical and experimental results demonstrate the ultra-broadband and reconfigurable features of the metascreen, covering a frequency range from 3 to 17 kHz, which is the majority spectrum of human hearing. The proposed metascreen opens a promising and pragmatic route for the design of compact broadband acoustic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Yifan Zhu, Aurelien Merkel, Liyun Cao, Yi Zeng, Sheng Wan, Tong Guo, Zihao Su, Siyuan Gao, Haohan Zeng, Hui Zhang, Badreddine Assouar
Summary: Numerically and experimentally, we demonstrate the acoustic analogue of super-Klein tunneling in a heterojunction of phononic crystals with Willis scatterers that possess pseudospin-1 Dirac cones. Unlike the pseudospin-1/2 Dirac cones, the pseudospin-1 cones require an additional flatband across the Dirac points in the band structure. The observed super-Klein tunneling in pseudospin-1 systems refers to perfect transmission at one specific frequency and all incidence angles within the energy barrier, which has significant implications for exploring the physics of pseudospin-1 quasiparticles.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Liyun Cao, Sheng Wan, Yi Zeng, Yifan Zhu, Badreddine Assouar
Summary: This study reports the existence of phononic skyrmions, new topological structures formed by the hybrid spin of elastic waves. The frequency-independent spin configuration of these skyrmions leads to ultra-broadband features and can be produced in any solid structure, including chip-scale ones. The experiment also demonstrates the robustness of phononic skyrmion lattices against local defects, sharp corners, and rectangular holes. This research opens up new possibilities for elastic wave manipulation and structuration through spin configuration and offers promising applications in phononic technologies.
Article
Physics, Applied
Shi-Wang Fan, Wen-Qi Wang, Hao-Wen Dong, Jinxi Liu, Hao-Bo Qi, Yue-Sheng Wang
Summary: The study proposes a broadband acoustic metasurface capable of generating acoustic vortices with orbital angular momentum. Through optimization design, the metasurface achieves high-efficiency transmission in a wide frequency range. This breakthrough has significant implications for the development of devices such as acoustic tweezers, antennas, and spanners.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Siyuan Gao, Yifan Zhu, Zihao Su, Haohan Zeng, Hui Zhang
Summary: This paper proposes a highly sparse acoustic meta-insulator array that can block sound and allow airflow. Numerical and experimental results show that this array has high sparsity and high sound attenuation capability over a broad bandwidth, making it suitable for noise control in various situations.
