Valley-projected edge modes observed in underwater sonic crystals
Mesoscale and Nanoscale Physics
2019-01-30 v1
Abstract
Recently, the topological physics in acoustics has been attracting much attention. However, all the studies are aimed to elastic or airborne sound systems. Realizing topological insulators for underwater sound is of great importance, since water is another crucial sound medium in addition to solid and air. Here we report an experimental study on the valley-projected edge states for underwater sound. The edge states are directly observed in our ultrasound scanning experiments, together with a solid evidence for the valley-selective excitation. The experimental data agree well with our numerical results. Prospective applications can be anticipated, such as for underwater sound signal processing and ocean noise control.
Keywords
Cite
@article{arxiv.1807.10887,
title = {Valley-projected edge modes observed in underwater sonic crystals},
author = {Yuanyuan Shen and Chunyin Qiu and Xiangxi Cai and Liping Ye and Jiuyang Lu and Manzhu Ke and Zhengyou Liu},
journal= {arXiv preprint arXiv:1807.10887},
year = {2019}
}
Comments
5 figures