Nonreciprocal sound propagation in space-time modulated media

Journal Article (Journal Article)

Realization of nonreciprocal devices, such as isolators and circulators, is of fundamental importance in microwave and photonic communication systems. This can be achieved by breaking time-reversal symmetry in the system or exploiting nonlinearity and topological effects. However, exploration of nonreciprocal devices remains scarce in acoustic systems. In this work, sound propagation in a space-time modulated medium is theoretically studied. Finite-difference time-domain simulations are carried out to verify the results. Functionalities such as mode conversion, parametric amplification, and phase conjugation are demonstrated.

Full Text

Duke Authors

Cited Authors

  • Li, J; Shen, C; Zhu, X; Xie, Y; Cummer, SA

Published Date

  • April 25, 2019

Published In

Volume / Issue

  • 99 / 14

Electronic International Standard Serial Number (EISSN)

  • 2469-9969

International Standard Serial Number (ISSN)

  • 2469-9950

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.99.144311

Citation Source

  • Scopus