基于对称与反对称谷边缘态的声能谷输运

施斌杰, 贾鼎, 葛勇

Acoustic valley transport based on antisymmetric and symmetric valley edge states

Binjie Shi, Ding Jia, Yong Ge

图2 (a)带隙底部与顶部本征态的频率与参数Δw/d关系,本征态K1,K2,K3,K4分别对应参数△w/d=±0.2； (b)数值模拟的本征态K1,K2,K3,K4对应的声压场分布，箭头表示声能流方向，环形箭头为声涡旋方向

Fig.2 (a) Eigenfrequencies of the band edge states as a function of Δw/d, the edge states K1，K2，K3 and K4 correspond to the parameters △w/d=±0.2, (b) simulated pressure distributions of the edge states K1，K2，K3 and K4, the arrows represent the direction of energy flux，and the circular arrows are the direction of sound vortex