Experimental Realization of On‐Chip Surface Acoustic Wave Metasurfaces at Sub‐GHz

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Metasurfaces, consisting of subwavelength-thickness units with different wave responses, provide an innovative possible method to manipulate elastic and acoustic waves efficiently. The application metasurfaces on-chip surface (SAW) at sub-GHz frequencies requires further exploration since their functions are highly demanded in nanoelectromechanical systems (NEMS), sensing, communications, microfluid control quantum processing. Here, the experimental realization SAW is reported, gradient submicron niobium (Nb) rectangular pillars positioned on a 128°Y-cut lithium niobate (LiNbO3) substrate that operate hundreds megahertz. proposed able transmitted wavefront by designing on-demand pillar's profile distributions. Broadband subwavelength focusing effects as typical experimentally demonstrated. This study opens door for realizing diverse potential applications micro- nanoscale.

Language: Английский

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Possible weaken of Rayleigh waves in weak porous media: Effects of surface drainage

Journal of Applied Geophysics, Journal Year: 2025, Volume and Issue: unknown, P. 105710 - 105710

Published: April 1, 2025

Language: Английский

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Seismic Meta‐Foundations With Imperfect Interfaces

Earthquake Engineering & Structural Dynamics, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

ABSTRACT Seismic wave isolation through layered meta‐foundations is an emerging area of research, driven by its intrinsic theoretical significance and potential practical applications. To date, the complexities associated with imperfect interfaces have often been overlooked in development analytical frameworks, which tend to prioritize simple yet effective closed‐form dispersion laws. This work provides a further step toward study under real‐world conditions incorporating effects interfaces. Our developed framework demonstrates that accounting for interface markedly enhances ultra‐low‐frequency attenuation meta‐foundations, as revealed complex analysis verified transmission finite‐sized meta‐foundations. enhancement achieved modifying stiffness mass interfaces, affects both location width frequency zones (AZs) improves within these domains. Overall, our incorporate demonstrate superior performance compared traditional offers model explores imperfections on their dynamic properties, paving way advancements design novel artificial

Language: Английский

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Bandgap mechanism and seismic wave attenuation performance of buried seismic metamaterials with double resonators

Mechanical Systems and Signal Processing, Journal Year: 2025, Volume and Issue: 231, P. 112726 - 112726

Published: April 10, 2025

Language: Английский

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Dissipative locally resonant metasurfaces for low-frequency Rayleigh wave mitigation

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110233 - 110233

Published: April 1, 2025

Language: Английский

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Experiment on broadband isolation of surface wave using pillared metastructures

Extreme Mechanics Letters, Journal Year: 2024, Volume and Issue: 70, P. 102180 - 102180

Published: June 6, 2024

Language: Английский

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Split-type seismic metamaterials with pseudo-surface wave weakening mechanism

Soil Dynamics and Earthquake Engineering, Journal Year: 2024, Volume and Issue: 184, P. 108858 - 108858

Published: July 18, 2024

Language: Английский

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Broadband surface wave manipulation by periodic barriers in unsaturated soil

Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences, Journal Year: 2024, Volume and Issue: 382(2278)

Published: July 29, 2024

Periodic wave barriers have been widely used to manipulate elastic waves propagating in saturated and single-phase soil due their attenuation zone properties. However, it is difficult promote application of periodic unsaturated soils complex constitutive relationship. In this study, manipulation surface by in-filled trench has studied based on the theory. The dispersion relations a structure for are determined. mechanism evanescent revealed. Next, effects several key parameters zones comprehensively discussed. It found that particular range material parameter, attenuated over entire frequency viscosity fluid. Finally, barrier designed according field test ground vibration induced train, its performances mitigating conducted compared conducting analysis time domain. This investigation provides new insight manipulating barriers. article part theme issue ‘Current developments acoustic metamaterials science (Part 1)’.

Language: Английский

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The 2024 phononic crystals roadmap

Journal of Physics D Applied Physics, Journal Year: 2024, Volume and Issue: 58(11), P. 113001 - 113001

Published: Dec. 5, 2024

Abstract Over the past 3 decades, phononic crystals experienced revolutionary development for understanding and utilizing mechanical waves by exploring interaction between structures. With significant advances in manufacture technologies from nanoscale to macroscale, attract researchers diverse disciplines study abundant directions such as bandgaps, dispersion engineering, novel modes, reconfigurable control, efficient design algorithms so on. The aim of this roadmap is present current state art, an overview properties, functions applications crystals, opinions on challenges opportunities. various perspectives cover wide topics basic property, homogenization, machine learning assisted design, topological, non-Hermitian, nonreciprocal, nanoscale, chiral, nonlocal, active, spatiotemporal, hyperuniform properties underwater acoustics, seismic wave protection, vibration noise thermal transport, sensing, acoustic tweezers, written over 40 renown experts. It also intended guide researchers, funding agencies industry identifying new prospects upcoming years.

Language: Английский

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Elastic surface wave attenuation in layered soil by metastructures

Low-carbon Materials and Green Construction, Journal Year: 2024, Volume and Issue: 2(1)

Published: April 15, 2024

Abstract Seismic metastructures are able to effectively attenuate or convert elastic surface waves, attracting increasing attention in different areas such as civil engineering. However, the effects of source depth and layered characteristics viscous soil on for wave reduction with Bragg bandgap mechanism remain challenging, which key issues practical applications. In this work, we calculate dispersion transmission confirm that can waves within bandgaps. Then, influence embedded metastructures, vibrating source, vibration further discussed. It is found attenuation enhanced by density first layer. The width increases introduction viscosity. On contrary, decreases if placed at a certain requires bulk metastructures. This study seismic provides guidance practice.

Language: Английский

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