Tunable acoustic double negativity metamaterial

Z. Liang, Morten Willatzen, J. Li, Johan Christensen

Research output: Contribution to journalJournal articleResearchpeer-review


Man-made composite materials called "metamaterials" allow for the creation of unusual wave propagation behavior. Acoustic and elastic metamaterials in particular, can pave the way for the full control of sound in realizing cloaks of invisibility, perfect lenses and much more. In this work we design acousto-elastic surface modes that are similar to surface plasmons in metals and on highly conducting surfaces perforated by holes. We combine a structure hosting these modes together with a gap material supporting negative modulus and collectively producing negative dispersion. By analytical techniques and full-wave simulations we attribute the observed behavior to the mass density and bulk modulus being simultaneously negative.
Original languageEnglish
Article number859
JournalScientific Reports
Number of pages5
Publication statusPublished - 2012
Externally publishedYes


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