Subwavelength acoustic focusing within multi-breadth bands with a window-shape metasurface Feng Gao, Jianlan Xie, Yuchen Peng, Bei Yan, Exian Liu, Peng Peng, Hang Li, Jiapei Jiang and Jianjun Liu EPL, 132 3 (2020) 38003 Published online: 28 December 2020 DOI: 10.1209/0295-5075/132/38003