Ye Yangtao, Ke Manzhu, Feng Junheng, Wang Mudi, Qiu Chunyin, Liu Zhengyou
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China.
J Phys Condens Matter. 2015 Apr 22;27(15):155402. doi: 10.1088/0953-8984/27/15/155402. Epub 2015 Mar 27.
We present designs of one-dimensional acoustic waveguide arrays and investigate wave propagation inside. Under the condition of single identical waveguide mode and weak coupling, the acoustic wave motion in waveguide arrays can be modeled with a discrete mode-coupling theory. The coupling constants can be retrieved from simulations or experiments as the function of neighboring waveguide separations. Sound injected into periodic arrays gives rise to the discrete diffraction, exhibiting ballistic or extended transport in transversal direction. But sound injected into randomized waveguide arrays readily leads to Anderson localization transversally. The experimental results show good agreement with simulations and theoretical predictions.
我们展示了一维声波导阵列的设计，并研究了其内部的波传播。在单个相同波导模式和弱耦合的条件下，波导阵列中的声波运动可以用离散模式耦合理论来建模。耦合常数可以从模拟或实验中作为相邻波导间距的函数来获取。注入到周期性阵列中的声音会产生离散衍射，在横向表现出弹道或扩展传输。但是注入到随机化波导阵列中的声音很容易在横向导致安德森局域化。实验结果与模拟和理论预测吻合良好。
