Acoustic metamaterials and metasurfaces: a transformative approach for phononic insulators and energy harvesting

被引:2
|
作者
Assouar, Badreddine [1 ,2 ]
Qi, Shuibao [1 ,2 ]
Li, Yong [1 ,2 ]
机构
[1] CNRS, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
[2] Univ Lorraine, lnst Jean Lamour, Blvd Aiguillettes,BP 70239, F-54506 Vandoeuvre Les Nancy, France
来源
QUANTUM SENSING AND NANO ELECTRONICS AND PHOTONICS XIV | 2017年 / 10111卷
关键词
Acoustic metamaterials; metasurface; sound absorption; energy harvesting;
D O I
10.1117/12.2250271
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
First, we will provide some recent advances on low-frequency phononic and acoustic insulators based on metasurfaces. We will introduce a new concept of acoustic absorption based on the coiling-up space design which exhibits extreme acoustic properties. A new acoustic absorber operating at 125Hz with deep-subwavelength thickness (similar to lambda/230) acting as an "acoustic sink" is designed and its functionalities are discussed. Second, as we are dealing with how to reduce or to absorb low-frequency sound/noise, we will explore a novel idea on the use in a positive manner these noises as a source of energy. We theoretically and numerically show the properties of a novel acoustic energy harvester resulting from the confinement and conversion of low-frequency acoustic/noise disturbances to electrical energy. We indeed present preliminary results showing a metamaterial structure producing an electrical power density of 0.54 mu w/cm(3) for one confined frequency, which presents a very good value compared the others acoustic energy harvesting approaches.
引用
收藏
页数:9
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