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

51 Scopus citations


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
Issue number14
StatePublished - Apr 25 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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