摘要
超材料指具有超越天然材料性能的人工材料,因其独特的物理性质及广泛的应用领域而受到人们的关注.固体中的弹性波被广泛应用于无损检测、无线通讯、无源传感等领域,具有重要的应用价值.不同于流体声波,固体中的弹性波由于存在纵波与横波的耦合及模式转换,更难以进行精确操纵,这就给超材料的应用提供了很好的舞台.本文以弹性波中极具代表性的板波作为焦点,较为系统地回顾了板波超材料的发展历史、主要研究进展及其在未来信息功能器件发展方向的潜力.
Elastic waves are widely used in our daily life,such as non-destructive testing,mineral exploration,analog signal processing and sensing systems,etc.,benefiting from their important advantages such as low loss and small wavelength(relative to electromagnetic waves).However,the transmission mechanism of elastic waves in traditional materials is relatively simple,so the ability to manipulate elastic waves using traditional materials is very limited.Metamaterials are artificial materials with unique physical properties that natural materials do not possess.In the 21 st century,with the prosperity of metamaterials,elastic metamaterials have also been developed,which greatly enriches people’s manipulation methods for elastic waves.This paper focuses on the representative plate wave among elastic waves,and systematically reviews the development of metamaterials for plate waves,their main research progress and their potential in future information functional devices.First,we present the history of metamaterial development.After comparing elastic waves with electromagnetic waves and airborne acoustics,we discuss the challenges of controlling elastic waves.Next,we introduce the plate wave in elastic waves in detail.We then review several representative applications using plate-wave metamaterials,including subwavelength imaging,cloaking,vibration isolation,and waveguiding,and their research progress in microwave information processing and energy harvesting.Two dimensional elastic metalenses used for subwavelength imaging enable evanescent waves to have far-field transmission capabilities,which enriches the spatial range for people to effectively control and utilize plate waves.The research on 2 D elastic cloaking has enabled people to have a deeper understanding of the governing equations of the plate wave,and to a large extent has enhanced people’s ability to control the transmission path of the plate wave.Compared with traditional materials,elastic metamaterials can theoretically completely suppress vibration,which g
作者
杨世礼
钟雨豪
颜士玲
张子栋
李鑫
余思远
卢明辉
Shili Yang;Yuhao Zhong;Shiling Yan;Zidong Zhang;Xin Li;Si-Yuan Yu;Ming-Hui Lu(College of Engineering and Applied Sciences,Nanjing Universiy,Nanjing 210093,China;Narional Laboratory of Solid Srate Microstructures,Nanjing Untversity,Nanjing 210093,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2022年第12期1232-1248,共17页
Chinese Science Bulletin
基金
国家重点研发计划(2017YFA0303702,2018YFA0306200)
国家自然科学基金(11890702,92163133,51902151,51732006)
江苏省自然科学基金(BK20190284)资助。
关键词
超材料
板波
亚波长成像
隔振
微波声学
能量收集
metamaterials
elastic plate wave
subwavelength imaging
vibration isolation
microwave acoustic
energy harvesters
