TY - JOUR
T1 - Numerical study of a near-zero-index acoustic metamaterial
AU - Jing, Yun
AU - Xu, Jun
AU - Fang, Nicholas X.
PY - 2012/10/1
Y1 - 2012/10/1
N2 - This Letter studies a two-dimensional, membrane-based acoustic metamaterial with a near-zero refractive index. It yields a frequency-dependent effective density that is near-zero at a narrow frequency band centered around its first resonant frequency. This effective density results in its near-zero refractive index. Numerical simulations are shown which demonstrate that the phase in this metamaterial undergoes small changes, and the metamaterial functions as an angular filter such that only a wave with a near-zero incident angle can transmit. Its ability to tailor acoustic phase pattern is also discussed in this Letter.
AB - This Letter studies a two-dimensional, membrane-based acoustic metamaterial with a near-zero refractive index. It yields a frequency-dependent effective density that is near-zero at a narrow frequency band centered around its first resonant frequency. This effective density results in its near-zero refractive index. Numerical simulations are shown which demonstrate that the phase in this metamaterial undergoes small changes, and the metamaterial functions as an angular filter such that only a wave with a near-zero incident angle can transmit. Its ability to tailor acoustic phase pattern is also discussed in this Letter.
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U2 - 10.1016/j.physleta.2012.08.057
DO - 10.1016/j.physleta.2012.08.057
M3 - Article
AN - SCOPUS:84868101077
SN - 0375-9601
VL - 376
SP - 2834
EP - 2837
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 45
ER -