Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.136802
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Funding
- National Basic Research Program of China [2015CB755500]
- National Natural Science Foundation of China [11774275, 11674250, 11534013, 11890701]
- National Key R&D Program of China [2018FYA0305800]
- Natural Science Foundation of Hubei Province [2017CFA042]
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Recently, intense efforts have been devoted to realizing classical analogues of various topological phases of matter. In this Letter, we explore the intriguing Weyl physics by a simple one-dimensional sonic crystal, in which two extra structural parameters are combined to construct a synthetic three-dimensional space. Based on our ultrasonic experiments, we have not only observed the synthetic Weyl points, but also probed the novel reflection phase singularity that connects inherently with the topological robustness of Weyl points. The presence of topologically nontrivial interface modes has been demonstrated further. As the first realization of topological acoustics in synthetic space, our study exhibits great potential of probing high-dimensional topological phenomena by such easily fabricated and detected low-dimension acoustic systems.
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