5 papers · 1 filter
Non-Hermitian-induced higher-order topological phases in acoustic fractal lattices
Shuanghuizhi Li, Bowei Wu, Tingfeng Ma +3
For fractal (non-integer-dimension) geometries in Hermitian system, high-order topological phases were realized in the past few years, for which, it is difficult to tune the energy…
Anomalous size effects with fixed criticality in bistable flexible mechanical metamaterials
Zehuan Tang, Tingfeng Ma, Boyue Su +3
When the structure deformation is dominated by the low-energy deformation mode, the structure hardens with the increase in the size (number of units) at small sizes. This anomalous…
Realization of Friedrich-Wintgen QBIC with high Q-factors based on acoustic-solid coupling and sensing applications
Bowei Wu, BoyueSu, Shuanghuizhi Li +1
In recent years, bound states in the continuum (BICs) have attracted extensive attentions in the sensing field due to their theoretically ultra-high resonance quality factors (Q-fa…
Tunable acoustic energy concentrations based on pseudo-spin locking waveguides and topological rainbow trappings
Bowei Wu, Teng Wang, Shuanghuizhi Li +1
In this work, tunable acoustic energy concentrations are realized based on pseudo-spin locking waveguides and topological rainbow trappings. Firstly, a tunable pseudo-spin locking…
Elastic fractal higher-order topological states
Tingfeng Ma, Bowei Wu, Jiachao Xu +5
Fractal is an intriguing geometry with self-similarity and non-integer dimensions, the elastic-wave topological phase based on fractal structures has not been revealed up to now. I…