Metasurfaces: Coding Acoustic Metasurfaces (Adv. Mater. 6/2017)

Abstract

Coding acoustic metasurfaces can combine simple logical bits to acquire sophisticated functions in wave control. The acoustic logical bits can achieve a phase difference of exactly π and a perfect match of the amplitudes for the transmitted waves. By programming the coding sequences, acoustic metasurfaces with various functions, including creating peculiar antenna patterns and waves focusing, are demonstrated by H. Cheng, S. Chen, J. Tian, and co-workers in article 1603507.