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Compact acoustic retroreflector based on a mirrored Luneburg lens

Publication ,  Journal Article
Fu, Y; Li, J; Xie, Y; Shen, C; Xu, Y; Chen, H; Cummer, SA
Published in: Physical Review Materials
October 18, 2018

We propose and demonstrate a compact acoustic retroreflector that reroutes incident signals back toward the source with minimal scattering. Gradient refractive index acoustic metamaterials, based on Archimedean spiral structures, are designed to fulfill the required refractive index profile. The experiments show that the compact acoustic retroreflector, whose radius is only approximately one wavelength, works in an incident angular range up to 120° over a bandwidth of about 27% of the central frequency. Such compact acoustic retroreflectors can be potentially applied in pulse-echo-based acoustic detection and communication, such as unmanned aerial vehicle sonar systems, robotic ranging detectors, and ultrasonic imaging systems.

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Published In

Physical Review Materials

DOI

EISSN

2475-9953

Publication Date

October 18, 2018

Volume

2

Issue

10

Related Subject Headings

  • 5104 Condensed matter physics
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry
 

Citation

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Fu, Y., Li, J., Xie, Y., Shen, C., Xu, Y., Chen, H., & Cummer, S. A. (2018). Compact acoustic retroreflector based on a mirrored Luneburg lens. Physical Review Materials, 2(10). https://doi.org/10.1103/PhysRevMaterials.2.105202
Fu, Y., J. Li, Y. Xie, C. Shen, Y. Xu, H. Chen, and S. A. Cummer. “Compact acoustic retroreflector based on a mirrored Luneburg lens.” Physical Review Materials 2, no. 10 (October 18, 2018). https://doi.org/10.1103/PhysRevMaterials.2.105202.
Fu Y, Li J, Xie Y, Shen C, Xu Y, Chen H, et al. Compact acoustic retroreflector based on a mirrored Luneburg lens. Physical Review Materials. 2018 Oct 18;2(10).
Fu, Y., et al. “Compact acoustic retroreflector based on a mirrored Luneburg lens.” Physical Review Materials, vol. 2, no. 10, Oct. 2018. Scopus, doi:10.1103/PhysRevMaterials.2.105202.
Fu Y, Li J, Xie Y, Shen C, Xu Y, Chen H, Cummer SA. Compact acoustic retroreflector based on a mirrored Luneburg lens. Physical Review Materials. 2018 Oct 18;2(10).

Published In

Physical Review Materials

DOI

EISSN

2475-9953

Publication Date

October 18, 2018

Volume

2

Issue

10

Related Subject Headings

  • 5104 Condensed matter physics
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry