Measurement of a Broadband Negative Index with Space-Coiling Acoustic Metamaterials

TitleMeasurement of a Broadband Negative Index with Space-Coiling Acoustic Metamaterials
Publication TypeJournal Article
Year of Publication2013
AuthorsY. Xie, B-I. Popa, L. Zigoneanu, S.A. Cummer
JournalPhysical Review Letters
Volume110
Issue17
Date Published4/2013
Abstract

We report the experimental demonstration of a broadband negative refractive index obtained in a labyrinthine acoustic metamaterial structure. Two different approaches were employed to prove the metamaterial negative index nature: one-dimensional extractions of effective parameters from reflection and transmission measurements and two-dimensional prism-based measurements that convincingly show the transmission angle corresponding to negative refraction.

Short TitlePhys. Rev. Lett.