Non-reciprocal sound propagation in space-time modulated media
Applied Physics
2019-05-01 v1
Abstract
Realization of non-reciprocal 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 non-reciprocal devices remains scarce in acoustic systems. In this work, sound propagation in a space-time modulated medium is theoretically studied. Finite-difference time-domain (FDTD) simulations are carried out to verify the results. Functionalities such as mode conversion, parametric amplification and phase conjugation are demonstrated.
Keywords
Cite
@article{arxiv.1811.04130,
title = {Non-reciprocal sound propagation in space-time modulated media},
author = {Junfei Li and Chen Shen and Yangbo Xie and Steven A. Cummer},
journal= {arXiv preprint arXiv:1811.04130},
year = {2019}
}
Comments
11 pages, 5 figures