Abstract
Natural creatures and ancient cultures are full of potential sources to provide inspiration for applied sciences.Inspired by the fractal geometry in nature and the fretwork frame in ancient culture,here we design the acoustic metasurface to realize sound anomalous modulation,which manifests itself as an incident-dependent propagation behavior:sound wave propagating in the forward direction is allowed to transmit with high efficiency while in the backward direction is obviously suppressed.We quantitatively investigate the dependences of asymmetric transmission on the propagation direction,incident angle and operating frequency by calculating sound transmittance and energy contrast.This compact fractal fretwork metasurface for acoustic anomalous modulation would promote the development of integrated acoustic devices and expand versatile applications in acoustic communication and information encryption.
基金项目
国家重点研发计划(2022YFA1404500)
国家自然科学基金(T2222024)
国家自然科学基金(12034005)
STCSM Science and Technology Innovation Plan of Shanghai Science and Technology Commission(20ZR1404200)
STCSM Science and Technology Innovation Plan of Shanghai Science and Technology Commission(21JC1400300)
NETL
NSTL
万方数据