The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.
Directional Acoustic Antennas Based on Valley‐Hall Topological Insulators
Open accessAbstract
Realizing directional acoustic signal transmittance and reception robust against surrounding noise and competing signals is crucial in many areas such as communication, navigation, and detection for medical and industrial purposes. The fundamentally wide‐angled radiation pattern of most current acoustic sensors and transducers displays a major limitation of the performance when it comes to precise targeting and probing of sound particular of interest in human speaking and hearing. Here, it is shown how topological acoustic valley transport can be designed to enable a unique beamforming mechanism that renders a superdirective needle‐like sound radiation and reception pattern. The strategy rests on out‐coupling valley‐polarized edge states, whose beam is experimentally detected in the far‐field with 10° width and a sound‐intensity enhancement factor ≈10. Furthermore, anti‐interference communication is proposed where sound is received from desired directions, but background noise from other directions is successfully suppressed. This type of topological acoustic antenna offers new ways to control sound with improved performance and functionalities that are highly desirable for versatile applications.
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Cites
A topological Dirac insulator in a quantum spin Hall phase
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Acoustic topological insulator and robust one-way sound transport
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Self-citationMicrophone Arrays Signal Processing Techniques and Applications
Brandstein, M. S., & Ward, D. B. (2001) · Cited by 998
Observation of topological valley transport of sound in sonic crystals
Lu, J., Qiu, C., Ye, L., Fan, X., Ke, M., Zhang, F., & Liu, Z. (2017) · Nature Physics · doi:10.1038/nphys3999 · Cited by 985
All-Si valley-Hall photonic topological insulator
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Floquet topological insulators for sound
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Topologically robust sound propagation in an angular-momentum-biased graphene-like resonator lattice
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Experimental demonstration of anomalous Floquet topological insulator for sound
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Cited by
Terahertz topological photonics for on-chip communication
Yang, Y., Yamagami, Y., Yu, X., Pitchappa, P., Webber, J., Zhang, B., Fujita, M., Nagatsuma, T., & Singh, R. (2020) · Nature Photonics · doi:10.1038/s41566-020-0618-9 · Cited by 842
Zhang, X., Xiao, M., Cheng, Y., Lu, M.-H., & Christensen, J. (2018) · Communications Physics · doi:10.1038/s42005-018-0094-4 · Cited by 357
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Metadata
- Authors
- Zhang, Z., Tian, Y., Wang, Y., Gao, S., Cheng, Y., Liu, X., & Christensen, J.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-07-30
- Volume
- 30
- Issue
- 36
- Pages
- e1803229-e1803229
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2887735385
- Cited by
- 300
- References
- 36
- FWCI
- 10.66
- Type
- journal article
- Language
- en
- Open access
- hybrid
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