Zhao Liuxian, Horiuchi Timothy, Yu Miao
Institute for Systems Research, University of Maryland, College Park, Maryland, 20742, USA
JASA Express Lett. 2022 Feb;2(2):024002. doi: 10.1121/10.0009386.
This paper investigates the acoustic Luneburg Lens (ALL) as a design framework for guiding acoustic wave propagation. In this study, an acoustic waveguide is proposed based on the characteristics of both acoustic wave focusing and collimation of cascaded ALLs. The continuous variation of the refractive index of the ALL is achieved by using lattice unit cells with a graded filling ratio. A cascaded ALL waveguide device is fabricated based on the additive manufacturing technique. The experimental results obtained with this device are consistent with the numerical simulations and theoretical calculations.
本文研究了声学朗伯透镜（ALL）作为引导声波传播的设计框架。在本研究中，基于级联ALL的声波聚焦和准直特性，提出了一种声波导。通过使用具有渐变填充率的晶格单元来实现ALL折射率的连续变化。基于增材制造技术制造了一种级联ALL波导器件。用该器件获得的实验结果与数值模拟和理论计算结果一致。
