Journal
PHYSICAL REVIEW MATERIALS
Volume 2, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.2.065201
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Funding
- National Natural Science Foundation of China [61571117, 61138001, 61371035, 11227904]
- 111 Project [111-2-05]
- Scientific Research Foundation of the Graduate School of Southeast University [YBJJ1711]
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This article reports on the design, numerical simulation, fabrication, and experimental test of an acoustic planar retroreflector capable of effectively reflecting sound along its incident direction for a wide operating angle range (0 degrees -70 degrees). The proposed acoustic planar retroreflector is a compound of two cascaded metasurfaces: a transmissive surface that converges the incident beam onto a second planar surface placed behind it, which serves as a reflective surface that bounces the beam back along the incident direction. Both the simulated and measured results provide evidence of the sound retroreflection effect. The structure proposed here provides a possible strategy for improving medical ultrasound, underwater communication, and illusion device design.
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