Acoustic Negative Refraction and Planar Focusing Based on Purely Imaginary Metamaterials

Acoustic Negative Refraction and Planar Focusing Based on Purely Imaginary Metamaterials

Acoustic purely imaginary metamaterials (PIMs) contain loss and gain uniformly distributed in space, but in different parameters. Therefore, the PIMs contain the elements of gain and loss simultaneously. As a result, some extraordinary wave modes may appear depending on whether gain or loss elements...

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Bibliographic Details
Main Authors: Ling-Ling Zhang, Xiao-Jun Liu
Format: Article
Language:English
Published: MDPI AG 2022-06-01
Series:Applied Sciences
Subjects:
purely imaginary metamaterials
acoustic equivalent lasing
coherent perfect absorption
negative refraction
planar focusing
Online Access:https://www.mdpi.com/2076-3417/12/12/5962

Internet

https://www.mdpi.com/2076-3417/12/12/5962

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