title: Transversal Anderson localization of sound in acoustic waveguide arrays.
abstract: 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.
authors: Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China.
authors: Yangtao
authors: Y
authors: Ye
authors: Manzhu
authors: M
authors: Ke
authors: Junheng
authors: J
authors: Feng
authors: Mudi
authors: M
authors: Wang
authors: Chunyin
authors: C
authors: Qiu
authors: Zhengyou
authors: Z
authors: Liu