Experimental Realization of Higher-order Topological Water Wave Crystal

@misc{zhao2026experimental,
  title = {{Experimental Realization of Higher-order Topological Water Wave Crystal}},
  author = {Jiayin Zhao and Yifan Liu and Jidong Song and Houqi Ai and Qinhui Jiang and Manjie Li and Mengyao Li},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.01924},
  eprint = {2611.01924},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.01924},
}

TY  - UNPB
TI  - Experimental Realization of Higher-order Topological Water Wave Crystal
AU  - Jiayin Zhao
AU  - Yifan Liu
AU  - Jidong Song
AU  - Houqi Ai
AU  - Qinhui Jiang
AU  - Manjie Li
AU  - Mengyao Li
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.01924
UR  - https://arxiv.org/abs/2611.01924
AB  - Free-surface water waves provide a macroscopic platform in which topological localization can be measured through surface-elevation fields. Higher-order topological phases offer a route to localizing wave modes at structural corners, yet their experimental realization in water-wave systems remains largely unexplored. Here, we experimentally demonstrate a water-wave higher-order topological crystal, where surface waves are confined to structural corners and spectrally identified through measured free-surface responses. Bulk band analysis and finite-system simulations predict topological edge and corner states in the designed structure, while frequency-resolved surface-elevation measurements confirm the corresponding localized modes. The measured spectra and field distributions reveal pronounced in-gap corner localization consistent with the predicted higher-order topological modes. These results establish surface water waves as a directly measurable platform for higher-order topological physics, enabling spatial localization and spectral characterization of hydrodynamic wave modes.
ER  -