TY - JOUR
T1 - Compact acoustic retroreflector based on a mirrored Luneburg lens
AU - Fu, Yangyang
AU - Li, Junfei
AU - Xie, Yangbo
AU - Shen, Chen
AU - Xu, Yadong
AU - Chen, Huanyang
AU - Cummer, Steven A.
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/10/18
Y1 - 2018/10/18
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevMaterials.2.105202
DO - 10.1103/PhysRevMaterials.2.105202
M3 - Article
AN - SCOPUS:85059849704
SN - 2475-9953
VL - 2
JO - Physical Review Materials
JF - Physical Review Materials
IS - 10
M1 - 105202
ER -