Extraordinary lateral beaming of sound from a square-lattice phononic crystal

作者：Bai, Xiaoxue; Qiu, Chunyin; He, Hailong; Peng, Shasha; Ke, Manzhu; Liu, Zhengyou^*

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2017, 381(9): 886-889.

DOI：10.1016/j.physleta.2016.12.044

• Phononic crystal
• Extraordinary lateral beaming
• Equifrequency contour

This work revisits the sound transmission through a finite phononic crystal of square lattice. In addition to a direct, ordinary transmission through the sample, an extraordinary lateral beaming effect is also observed. The phenomenon stems from the equivalence of the states located around the four corners of the first Brillouin zone. The experimental result agrees well with the theoretical prediction. The lateral beaming behavior enables a simple design for realizing acoustic beam splitters.

• 出版日期2017-3-3
• 单位武汉大学