Multiplexed chiral and helical acoustic anomaly bulk states in an inverse-designed metamaterial

@misc{wen2026multiplexed,
  title = {{Multiplexed chiral and helical acoustic anomaly bulk states in an inverse-designed metamaterial}},
  author = {Xueyun Wen and Zhihao Lan and Zhongming Gu and Yafeng Chen and Jie Zhu},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.36718},
  eprint = {2609.36718},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.36718},
}

TY  - UNPB
TI  - Multiplexed chiral and helical acoustic anomaly bulk states in an inverse-designed metamaterial
AU  - Xueyun Wen
AU  - Zhihao Lan
AU  - Zhongming Gu
AU  - Yafeng Chen
AU  - Jie Zhu
PY  - 2026
DA  - 2026/09/29
PB  - arXiv
DO  - 10.48550/arxiv.2609.36718
UR  - https://arxiv.org/abs/2609.36718
AB  - Valley and pseudospin are fundamental degrees of freedom (DOFs) in topological acoustics. However, they have so far been realized mostly in separate systems. Here, we achieve the multiplexing of valley and pseudospin DOFs in one acoustic system. An acoustic metamaterial simultaneously hosting single and double Dirac cones is inversely designed by the developed topology optimization method. Thereafter, under a hard-boundary condition, valley-locked chiral states and pseudospin-locked helical states emerge within two separate frequency windows and can be selected by tuning the operating frequency. Furthermore, their applications for multifrequency acoustic energy enhancement are experimentally demonstrated. Our work provides a strategy to modulate acoustic waves carrying distinct topological DOFs within a single integrated platform, facilitating the development of multiplexed acoustic devices with robustness.
ER  -