On extending the concept of double negativity to acoustic waves

C. T. Chan, Jensen Li, Kin Hung Fung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)24-28
Number of pages5
JournalJournal of Zhejiang University: Science
Issue number1
Publication statusPublished - 1 Jan 2006
Externally publishedYes


  • Acoustic
  • Double negativity
  • Metamaterials

ASJC Scopus subject areas

  • Engineering(all)


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