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1. Efficient nonreciprocal mode transitions in spatiotemporally modulated acoustic metamaterials.

Author

Zhaoxian Chen, Yugui Peng, Haoxiang Li, Jingjing Liu, Yujiang Ding, Bin Liang, Xue-Feng Zhu, Yanqing Lu, Jianchun Cheng, and Alù, Andrea

Subjects
*CONDENSED matter physics, *METAMATERIALS, *APPLIED sciences, *ELECTROMAGNETISM, *NEGATIVE refraction, *WAVE diffraction
Abstract

The article focuses on efficient nonreciprocal mode transitions in spatiotemporally modulated acoustic metamaterials. Topics include the mechanism relies on the coupling between an ultrathin membrane and external biasing electromagnetic fields, realizing programmable dynamic control of the acoustic impedance over a motionless and noiseless platform, and the fast and flexible impedance modulation of our metamaterial imparts an effective unidirectional momentum in space-time.

Published
2021
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