Nonreciprocal sound propagation in space-time modulated media

被引：55

作者：

Li, Junfei ^{[1
]}

Shen, Chen ^{[1
]}

Zhu, Xiaohui ^{[2
]}

Xie, Yangbo ^{[1
]}

Cummer, Steven A. ^{[1
]}

机构：

[1] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA

[2] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

PHYSICAL REVIEW B | 2019年 / 99卷 / 14期

基金：

美国国家科学基金会;

关键词：

DISPERSION-RELATIONS; PERIODIC MEDIA; WAVE;

D O I：

10.1103/PhysRevB.99.144311

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：9

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