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Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces

Publication ,  Journal Article
Shen, C; Xie, Y; Li, J; Cummer, SA; Jing, Y
Published in: Applied Physics Letters
May 30, 2016

We present a design of acoustic metasurfaces yielding asymmetric transmission within a certain frequency band. The design consists of a layer of gradient-index metasurface and a layer of low refractive index metasurface. Incident waves are controlled in a wave vector dependent manner to create strong asymmetric transmission. Numerical simulations show that the approach provides high transmission contrast between the two incident directions within the designed frequency band. This is further verified by experiments. Compared to previous designs, the proposed approach yields a compact and planar device. Our design may find applications in various scenarios such as noise control and therapeutic ultrasound.

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Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

May 30, 2016

Volume

108

Issue

22

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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Shen, C., Xie, Y., Li, J., Cummer, S. A., & Jing, Y. (2016). Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces. Applied Physics Letters, 108(22). https://doi.org/10.1063/1.4953264
Shen, C., Y. Xie, J. Li, S. A. Cummer, and Y. Jing. “Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces.” Applied Physics Letters 108, no. 22 (May 30, 2016). https://doi.org/10.1063/1.4953264.
Shen C, Xie Y, Li J, Cummer SA, Jing Y. Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces. Applied Physics Letters. 2016 May 30;108(22).
Shen, C., et al. “Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces.” Applied Physics Letters, vol. 108, no. 22, May 2016. Scopus, doi:10.1063/1.4953264.
Shen C, Xie Y, Li J, Cummer SA, Jing Y. Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces. Applied Physics Letters. 2016 May 30;108(22).

Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

May 30, 2016

Volume

108

Issue

22

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences