On-chip valley phononic crystal plates with graded topological interface

Zhao, Jinfeng; Wang, Qi; Wang, Xubo; Yuan, Weitao; Huang, Yao; Chen, Shuhan; Riaud, Antoine; Jia, Zhenhong

doi:10.1016/j.ijmecsci.2022.107460

Cited by 21 publications

(10 citation statements)

References 66 publications

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“…These so-called topological metamaterials enable low-loss transport and arbitrary directional manipulation of elastic waves via localized topological states that are protected from unwanted scattering in the presence of structural defects or disorder. [5][6][7][8][9] The remarkable capabilities and robustness of topological metamaterials have been exploited to enhance performance in technical applications that include vibration energy harvesters [10][11][12][13][14] and a mechanical information processor, [15] and have additionally inspired investigations on their potential implementation in on-chip devices [16][17][18][19] and elastic antennas. [20] Initial research concerning topological metamaterials focused on the theoretical prediction and experimental demonstration of 0D topological states in 1D mechanical structures (e.g., the wave is localized at a point in a rod) and 1D topological states in 2D mechanical structures (e.g., the wave is localized along a line waveguide in a thin plate).…”

Section: Introductionmentioning

confidence: 99%

Uncovering and Experimental Realization of Multimodal 3D Topological Metamaterials for Low‐Frequency and Multiband Elastic Wave Control

Dorin,

Khan,

Wang

2023

Advanced Science

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Topological mechanical metamaterials unlock confined and robust elastic wave control. Recent breakthroughs have precipitated the development of 3D topological metamaterials, which facilitate extraordinary wave manipulation along 2D planar and layer‐dependent waveguides. The 3D topological metamaterials studied thus far are constrained to function in single‐frequency bandwidths that are typically in a high‐frequency regime, and a comprehensive experimental investigation remains elusive. In this paper, these research gaps are addressed and the state of the art is advanced through the synthesis and experimental realization of a 3D topological metamaterial that exploits multimodal local resonance to enable low‐frequency elastic wave control over multiple distinct frequency bands. The proposed metamaterial is geometrically configured to create multimodal local resonators whose frequency characteristics govern the emergence of four unique low‐frequency topological states. Numerical simulations uncover how these topological states can be employed to achieve polarization‐, frequency‐, and layer‐dependent wave manipulation in 3D structures. An experimental study results in the attainment of complete wave fields that illustrate 2D topological waveguides and multi‐polarized wave control in a physical testbed. The outcomes from this work provide insight that will aid future research on 3D topological mechanical metamaterials and reveal the applicability of the proposed metamaterial for wave control applications.

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Section: Introductionmentioning

confidence: 99%

Uncovering and Experimental Realization of Multimodal 3D Topological Metamaterials for Low‐Frequency and Multiband Elastic Wave Control

Dorin,

Khan,

Wang

2023

Advanced Science

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“…Furthermore, the robustness and pseudospin-dependent features are still preserved in topological systems based on valley DOF. Notably, the valley DOF has recently sparked several devices on microscale or nanoscale chips, being used to synthesize PC circuits up to megahertz or gigahertz and possible light-matter interactions [17,19,41,45,46].…”

Section: Introductionmentioning

confidence: 99%

“…Another attractive approach to improve the information capacity and functionality of a device is with the help of the transverse properties to control the wavefront shape of propagating waves. For example, TES based on valley DOF demonstrate transversely symmetric and antisymmetric properties [3,46,47,49,50] against the interface between PC plates with opposite topological phases. Such transverse properties are important for controlling wave coupling between topological interfaces and other components, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Such transverse properties are important for controlling wave coupling between topological interfaces and other components, e.g. the abnormal refraction behind the truncated interface [46,50] and selective coupling before the inlet of an interface [47], or to propose different requirements for efficient generation of TES at different interfaces. Transversely symmetric and antisymmetric properties provide useful clues for source selection and device construction.…”

Section: Introductionmentioning

confidence: 99%

“…Transversely symmetric and antisymmetric properties provide useful clues for source selection and device construction. However, a precise theoretical explanation of the transversely symmetric and antisymmetric properties of TES is missing for acoustic or elastic waves [3,46,47,49,50].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical and experimental demonstrations of the transversely symmetric and antisymmetric properties of topological edge states

Yuan¹,

Zhao²,

Long³

et al. 2023

J. Phys. D: Appl. Phys.

Self Cite

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Topological phononics are well known for their topological edge states due to the backscattering immunity and pseudospin dependent phonon transportation. Here, we study two types of topological edge states on valley phononic crystal plate. We magnify the transversely symmetric and antisymmetric property by observing the displacement distribution in both simulation and experiment. We underline the theoretical origin of transversely symmetric and antisymmetric property based on a simplified mass-spring model, i.e., the combination of the phase difference caused by the periodicity of PC plate and the phase difference between sites p and q in unit cell. Our results enrich the features of topological edge states, and offer the possibility for designing mechanical device or controlling the wave propagation along phonon circuits.

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An All‐Polarized Elastic Topological Metamaterial for Ultrasonic Energy Conveying and Harvesting

Chen,

Fan,

Zhu

et al. 2024

Adv Funct Materials

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Microelastic topological metamaterials (METMs) are of great use in the robust conveying and harvesting of high‐frequency ultrasonic energies. However, current METMs only hold topological edge states of a single flexural mode, restricting their capacity to convey ultrasonic energies of other polarized elastic waves. Moreover, the potential of METMs for ultrasonic energy harvesting remains unexplored. To address these challenges, an all‐polarized elastic topological metamaterial (AETM) is developed, capable of simultaneous conveying and harvesting of ultrasonic energies from elastic waves of all polarizations. This AETM supports broadband topological edge states for both out‐of‐plane and in‐plane modes, enabling the robust conveying of ultrasonic energies from all‐polarized elastic waves. Subsequently, by integrating the AETM with a piezoelectric energy harvester, efficient harvesting of ultrasonic energies conveyed by the AETM is achieved. Notably, the developed AETM with structural simplicity can be easily integrated into micro‐electromechanical systems (MEMSs) for on‐chip ultrasonic wave communication and energy harvesting. This work advances the development of topological metamaterials that can concurrently convey and harvest ultrasonic energies from all‐polarized elastic waves, offering significant potential for various MEMS applications.

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On-chip valley phononic crystal plates with graded topological interface

Cited by 21 publications

References 66 publications

Uncovering and Experimental Realization of Multimodal 3D Topological Metamaterials for Low‐Frequency and Multiband Elastic Wave Control

Uncovering and Experimental Realization of Multimodal 3D Topological Metamaterials for Low‐Frequency and Multiband Elastic Wave Control

Theoretical and experimental demonstrations of the transversely symmetric and antisymmetric properties of topological edge states

An All‐Polarized Elastic Topological Metamaterial for Ultrasonic Energy Conveying and Harvesting

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