Active Acoustic Metamaterials  

作　　者：Xulong Wang Guancong Ma 王绪隆;马冠聪(Department of Physics,Hong Kong Baptist University,Kowloon Tong,Hong Kong,China;Department of Physics,Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China;Shenzhen Institute for Research and Continuing Education,Hong Kong Baptist University,Shenzhen 518000,China)

机构地区：[1]Department of Physics,Hong Kong Baptist University,Kowloon Tong,Hong Kong,China [2]Department of Physics,Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China [3]Shenzhen Institute for Research and Continuing Education,Hong Kong Baptist University,Shenzhen 518000,China

出　　处：《Chinese Physics Letters》2025年第1期79-82,共4页中国物理快报(英文版)

摘　　要：The history of acoustic metamaterials can be traced back to the turn of the 215 century,when the local res-onances of subwavelength structures were leveraged for acoustic properties unavailable in natural materials.[1 Over a quarter of 8 century,acoustic metamaterials have continued to thrive as numerous novel acoustic effects have been investigated and realized.[2-6]However,acous-tic metamaterials were entirely passive in their early days,thus indicating that their functionalities were singular and entirely determined at the fabrication stage.Additionally,even at the effective-medium level,such passive metama-terials must obey fundamental laws,such as time reversal symmetry and causality.These limitations can be over-come by employing active components in metamaterial design.Thus,we surveyed the development,functionalities,and implications of active acoustic metamaterials.

关 键 词：MATERIALS entirely SYMMETRY 

分 类 号：TB34[一般工业技术—材料科学与工程]