Ultra-wideband valley transmission on elastic topological phononic crystals

Article Engineering, Electrical & Electronic

Synthesis and design of filters and multiplexers with acoustic transversal topology

Rafael Perea-Robles et al.

Summary: This study introduces a novel acoustic transversal topology that has the potential to be used for the development of the next generation of communication filters. It has the advantage of achieving any filter response without the limitation of electro-acoustic coupling. Additionally, it allows for easy connections of different filters to create multiband and multiplexing responses.

INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES (2022)

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Article Multidisciplinary Sciences

Extended topological valley-locked surface acoustic waves

Ji-Qian Wang et al.

Summary: The authors provide experimental evidence for extended topological valley-locked states and propose their application in acoustics devices. By combining Dirac semimetals and topological insulators, they demonstrate reduced backscattering and improved matching of surface acoustic waves (SAWs) with interdigital transducers. Through the design and manufacturing of miniaturized phononic crystals on a semi-infinite substrate, they successfully realize valley-locked edge transport for SAWs. This work has important implications for future acoustic information processing, sensing, and manipulation.

NATURE COMMUNICATIONS (2022)

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Article Mathematics, Interdisciplinary Applications

Pinning Synchronization of Coupled Oscillators with Paired Topologies

Zhang Miaosen et al.

Summary: This paper investigates the pinning synchronization problem of a group of coupled oscillators, taking into account both dissipative and restorative interactions. Paired coupling topologies are introduced to capture this feature of the dynamics. To achieve synchronization, pinning control is introduced, and two criteria are proposed to ensure the synchronization. Both criteria provide sufficient and necessary conditions for pinning synchronization of the coupled oscillators with paired topologies. Simulation examples are used to verify the proposed theoretical results.

JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY (2022)

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Article Multidisciplinary Sciences

On-chip higher-order topological micromechanical metamaterials

Ying Wu et al.

Summary: This study reports the first experimental realization of an on-chip micromechanical metamaterial as a higher-order topological insulator for elastic waves at MHz. The higher-order topological phononic band gap is induced by band inversion at the Brillouin zone corner achieved by configuring orientations of elliptical pillars etched on the silicon chip. The experimental realization demonstrates the coexistence of topological edge and corner states induced by higher-order band topology in a single silicon chip.

SCIENCE BULLETIN (2021)

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Article Nanoscience & Nanotechnology