One-way acoustic mirror based on anisotropic zero-index media

We have designed a one-way acoustic mirror comprising anisotropic zero-index media. For acoustic beam incident at a particular angle, the designed structure behaves like a high-efficient mirror that redirects almost all the incident energy into another direction predicted by the Snell's law, wh...

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Bibliographic Details
Published in:Applied physics letters 2015-11, Vol.107 (21)
Main Authors: Gu, Zhong-ming, Liang, Bin, Zou, Xin-ye, Yang, Jing, Li, Yong, Yang, Jun, Cheng, Jian-chun
Format: Article
Language:English
Subjects:
Acoustic noise
Acoustics
ANISOTROPY
Applied physics
BEAMS
Beams (radiation)
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DESIGN
Flexible working
GEOMETRY
MIRRORS
NOISE
Noise control
REFLECTION
Snells law
SPACE
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Summary:We have designed a one-way acoustic mirror comprising anisotropic zero-index media. For acoustic beam incident at a particular angle, the designed structure behaves like a high-efficient mirror that redirects almost all the incident energy into another direction predicted by the Snell's law, while becoming virtually transparent to beams propagating reversely along this output path. Furthermore, the mirror can be tailored to work at arbitrary incident angle by simply adjusting its geometry. Our design, with undirectional reflection functionality and flexible working angle, may offer possibilities in space isolations and have deep implication in various scenarios like ultrasound imaging or noise control.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4936373