On extending the concept of double negativity to acoustic waves

被引：42
作者：
Chan C.T. [1 ]
Li J. [1 ]
Fung K.H. [1 ]
机构：
[1] Department of Physics, Hong Kong University of Science and Technology, Hong Kong
来源：
Journal of Zhejiang University-SCIENCE A | 2006年 / 7卷 / 1期
关键词：
Acoustic; Double negativity; Metamaterials;
D O I：
10.1631/jzus.2006.A0024
中图分类号：
学科分类号：
摘要：
The realization of double negative electromagnetic wave media, sometimes called left-handed materials (LHMs) or metamaterials, have drawn considerable attention in the past few years. We will examine the possibility of extending the concept to acoustic waves. We will see that acoustic metamaterials require both the effective density and bulk modulus to be simultaneously negative in the sense of an effective medium. If we can find a double negative (negative density and bulk modulus) acoustic medium, it will be an acoustic analogue of Veselago's medium in electromagnetism, and share many novel consequences such as negative refractive index and backward wave characteristics. We will give one example of such a medium.
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页码：24 / 28
页数：4
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