Three-Dimensional Acoustic Double-Zero-Index Medium with a Fourfold Degenerate Dirac-like Point
Type
ArticleKAUST Department
Applied Mathematics and Computational Science ProgramComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Waves in Complex Media Research Group
Date
2020-02-19Submitted Date
2019-04-14Permanent link to this record
http://hdl.handle.net/10754/662156
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We report the first realization of a three-dimensional (3D) acoustic double-zero-index medium (DZIM) made of a cubic lattice of metal rods. While the past decade has seen several realizations of 2D DZIM, achieving such a medium in 3D has remained an elusive challenge. Here, we show how a fourfold degenerate point with conical dispersion can be induced at the Brillouin zone center, such that the material becomes a 3D DZIM with the effective mass density and compressibility simultaneously acquiring near-zero values. To demonstrate the functionalities of this new medium, we have fabricated an acoustic waveguide of 3D DZIM in form of aCitation
Xu, C., Ma, G., Chen, Z.-G., Luo, J., Shi, J., Lai, Y., & Wu, Y. (2020). Three-Dimensional Acoustic Double-Zero-Index Medium with a Fourfold Degenerate Dirac-like Point. Physical Review Letters, 124(7). doi:10.1103/physrevlett.124.074501Publisher
American Physical Society (APS)Journal
Physical Review LettersAdditional Links
https://link.aps.org/doi/10.1103/PhysRevLett.124.074501ae974a485f413a2113503eed53cd6c53
10.1103/PhysRevLett.124.074501