Topological acoustic polaritons: robust sound manipulation at the subwavelength scale
By Simon Yves, R. Fleury, F. Lemoult, Mathias Fink, Geoffroy Lerosey. 2017
169 citations recorded by the source corpus.
Topological insulators, a hallmark of condensed matter physics, have recently reached the classical realm of acoustic waves. A remarkable property of time-reversal invariant topological insulators is the presence of unidirectional spin-polarized propagation along their edges, a property that could lead to a wealth of new opportunities in the ability to guide and manipulate sound. Here, we demonstrate and study the possibility to induce topologically non-trivial acoustic states at the deep subwavelength scale, in a structured two-dimensional metamaterial composed of Helmholtz resonators. Radically different from previous designs based on non-resonant sonic crystals, our proposal enables robust sound manipulation on a surface along predefined, subwavelength pathways of arbitrary shapes.
Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/83246e01bf298db9cc714c43dfbe1416269e487a
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In Atomic and Molecular Physics, and Optics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- A study of topological effects in 1D and 2D mechanical lattices (2018, background): “…other insulators, such as the quantum Hall ( Chen and Wu, 2016; Fleury et al., 2016; Nash et al., 2015; Yang et al., 2015 ) and the quantum spin Hall insulators ( Mousavi et al., 2015; Süsstrunk and Huber, 2015; Yves et al., 2017a; 2017b ), have been implemented in more general 2D geometries.”
- Active times for acoustic metamaterials (2019, background): “surrounding band gaps and is garanteed regardless of how the interface is drawn [180].”