摘要
我们将展示一种控制声波反常折射的超表面,这种结构由空间变化的弯曲缝-亚单元组成,厚度处于深亚波长,通过精心优化微观结构,这种设计在控制声波波前方面表现出了优异的性能,我们实验测量的结果与理论预测吻合得很好。这项研究为众多日常生活应用开辟了新的途径,例如通过装上轻而薄的超表面结构来控制室内声场效应。
We demonstrate an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way.This flat lens,made of spatially varied coiling-slit subunits,has a thickness of deep subwavelength.By elaborately optimizing its microstructures,the proposed lens exhibits high performance in steering sound wavefronts.The experimental results are in excellent agreement with the theoretical predictions.This study may open new avenues for numerous daily life applications,such as controlling indoor sound effects by decorating rooms with light metasurface walls.
作者
唐昆
邱春印
柯满竹
陆久阳
刘正猷
TANG Kun;QIU Chun-yin;KE Man-zhu;LU Jiu-yang;LIU Zheng-you(Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology,Wuhan University,Wuhan 430072,China)
出处
《声学技术》
CSCD
2014年第S01期85-88,共4页
Technical Acoustics
关键词
超表面
声波
广义斯涅耳定律
metasurface
acoustic wave
generalized Snell’s law
作者简介
唐昆,男,湖北麻城人,博士研究生,研究方向为人工结构材料。邮箱:mayo_tang@whu.edu.cn;通讯作者:邱春印,男,武汉大学物理科学与技术学院副教授,主要从事人工结构材料的研究。邮箱:cyqiu@whu.edu.cn
