Topological acoustic waveguide with high-precision internal-mode-induced multiband

Ma, Chengzhi; Wu, Jiu Hui; Cui, Zhanyou; Wang, Linbo

doi:10.1016/j.compstruct.2023.117681

Cited by 9 publications

(2 citation statements)

References 45 publications

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“…Recent research on electronic systems has stimulated the study of topological insulators in acoustic systems [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Because the symmetry of artificial crystals facilitates flexible clipping, the acoustic Quantum Valley Hall effect (AVH) [47] has received increasing attention [48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Stepless space-regulation of topological acoustic controller with high fault tolerance

Ma,

Wu,

Liu

et al. 2024

J. Phys. D: Appl. Phys.

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In this paper, the stepless space-regulation of topological acoustic transmission channels with high fault tolerance is proposed through introducing structural defect dislocations into a topological acoustic controller. Due to the stability of topological order against local disturbance, the acoustic wave transmission is immune to dislocation boundaries with strong stability, and thus the topological acoustic controller has high fault tolerance. By continuous changing the dislocation, the position relationship between the outgoing and incident acoustic signals no longer limited to the integer multiple distance related to the lattice size, and can realize the efficient acoustic energy transmission without energy loss at the fractional multiple distance, that is, the topological controller can realize lossless sound energy transmission and reception in arbitrary position relationship. Furthermore, the coupling relationship between the defect dislocation and the topological acoustic channel is explored, which can realize the stepless space-regulation of the lossless channel in the wide band range. In addition, by further introducing multi-layer continuous dislocations, this high-fault-tolerant topological acoustic controller still has strong stability, and multiple error factors do not affect the transmission results, which greatly reduces the difficulty of manufacturing. Finally, the stepless space-regulation of topological acoustic channels and the high-fault-tolerant topological acoustic controller that are easy to manufacture are verified by our experiments. This research paves the way for the engineering applications of acoustic micro-control, micro-nano fabrication, remote acoustic energy transmission manipulation, acoustic measurement, weak signal processing, acoustic flexible control and other micro-shape and multi-functional acoustic devices, and will bring more inspiration to other classical wave communication fields such as light wave, electromagnetic wave and so on.

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Section: Introductionmentioning

confidence: 99%

Stepless space-regulation of topological acoustic controller with high fault tolerance

Ma,

Wu,

Liu

et al. 2024

J. Phys. D: Appl. Phys.

Self Cite

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show abstract

“…As a result, acoustic topological insulators have topological interface transmission properties only for acoustic waves in specific frequency bands . Some researchers have broken this limitation by constructing multiple bands [21][22][23]. Other researchers have refined the system with different acoustic topologies for different frequency band ranges [26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Low-frequency broadband valley transport for acoustic topology based on extended resonance

Liang,

Luo,

Chu

et al. 2024

Phys. Scr.

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In view of the fact that the operating bandwidth of the current acoustic topology is not low enough and the bandgap width is narrow at low frequencies, an extended resonance method is proposed. It is possible to have a bandgap width of 100 Hz while lowering the operating band to 350 Hz. And the operating band can be reconfigured with the controllability of the structure. This work will make a significant contribution to low-frequency broadband as well as subwavelength band regulation.

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Controlled transmission of multiband acoustic waves based on composite resonant cavities

Liang,

Zhang,

Chu

et al. 2024

Appl. Phys. A

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Topological acoustic waveguide with high-precision internal-mode-induced multiband

Cited by 9 publications

References 45 publications

Stepless space-regulation of topological acoustic controller with high fault tolerance

Stepless space-regulation of topological acoustic controller with high fault tolerance

Low-frequency broadband valley transport for acoustic topology based on extended resonance

Controlled transmission of multiband acoustic waves based on composite resonant cavities

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