Nonreciprocal sound propagation in space-time modulated media

Junfei Li, Chen Shen, Xiaohui Zhu, Yangbo Xie, Steven A. Cummer

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number144311
JournalPhysical Review B
Volume99
Issue number14
DOIs
StatePublished - Apr 25 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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