Topologically protected one-way edge mode in networks of acoustic resonators with circulating air flow
By Xu Ni, Cheng He, Xiao‐Chen Sun, Xiao-ping Liu, Ming-Hui Lu, Liang Feng, Yan-Feng Chen. Progress in Electromagnetics Research Symposium, 2015
239 citations recorded by the source corpus.
Recent explorations of topology in physical systems have led to a new paradigm of condensed matters characterized by topologically protected states and phase transition, for example, topologically protected photonic crystals enabled by magneto-optical effects. However, in other wave systems such as acoustics, topological states cannot be simply reproduced due to the absence of similar magnetics-related sound–matter interactions in naturally available materials. Here, we propose an acoustic topological structure by creating an effective gauge magnetic field for sound using circularly flowing air in the designed acoustic ring resonators. The created gauge magnetic field breaks the time-reversal symmetry, and therefore topological properties can be designed to be nontrivial with non-zero Chern numbers and thus to enable a topological sonic crystal, in which the topologically protected acoustic edge-state transport is observed, featuring robust one-way propagation characteristics against a variety of topological defects and impurities. Our results open a new venue to non-magnetic topological structures and promise a unique approach to effective manipulation of acoustic interfacial transport at will.
Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Geophysics
View Paper: https://www.semanticscholar.org/paper/afc338fbdeffe8934431ec8948d2dde8d3ffe636
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In Atomic and Molecular Physics, and Optics
- Ze-Guo Chen
- Jianwen Dong
- Fulong Shi
- Jianwei Liu
- Xiujuan Zhang
- Xiaodong Chen
- Yan-Feng Chen
- Ming-Hui Lu
In Biomedical Engineering
Citations in the corpus
- Tunable topological phononic crystals (2015, background): “in determining the Chern number of the bands connected by Dirac cones in phononic crystals with broken T symmetry and with C3v or C6v symmetry [10].”
- Observation of second-order topological insulators in sonic crystals (2018, background): “These gapless edge states are dictated by the topological invariants associated with the quantization of generalized Berry’s phases of the bulk energy bands through the bulk-edge correspondence, a paradigm that can also be extended to acoustic and photonic systems [5-23].”
- Topological Photonic Crystals: Physics, Designs, and Applications (2022, background): “Recently, topology has been widely applied in different fields, including condensed matter [1-6], cold atom [7, 8], acoustics [9-13] and mechanics [14-16].”