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Received: 2005-10-30

Revision Accepted: 2005-11-22

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Cited: 6

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.1 P.24~28


On extending the concept of double negativity to acoustic waves

Author(s):  Chan C.T., Li Jensen, Fung K.H.

Affiliation(s):  Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China

Corresponding email(s):   phchan@ust.hk

Key Words:  Double negativity, Metamaterials, Acoustic

Chan C.T., Li Jensen, Fung K.H.. On extending the concept of double negativity to acoustic waves[J]. Journal of Zhejiang University Science A, 2006, 7(1): 24~28.

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%A Fung K.H.
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A1 - Chan C.T.
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J0 - Journal of Zhejiang University Science A
VL - 7
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DOI - 10.1631/jzus.2006.A0024

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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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