High refractive-index sonic material based on periodic subwavelength structure

被引：36
作者：
Cai, Feiyan [1 ]
Liu, Fengming [1 ]
He, Zhaojian [1 ]
Liu, Zhengyou [1 ]
机构：
[1] Wuhan Univ, Minist Educ, Dept Phys, Key Lab Acoustic & Photon Mat, Wuhan 430072, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 20期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2814920
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We show that a steel plate with periodic array of subwavelength slits or holes can serve as a material of tunable refractive index for acoustic waves. The effective refractive index is inversely proportional to the filling factor of the slits or holes, which enables the realization of high refractive-index material for acoustic waves. An acoustic wave focusing lens based on this material is exemplified. (c) 2007 American Institute of Physics.
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