Double-negative acoustic metamaterial

by: Jensen Li, CT Chan

Physical Review E, Vol. 70, No. 5. (18 November 2004), 055602.

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Abstract

We show here the existence of acoustic metamaterial; in which both the effective density and bulk modulus are simultaneously negative; in the true and strict sense of an effective medium. Our double-negative acoustic system is an acoustic analogue of Veselago’s medium in electromagnetism; and shares many unique consequences; such as negative refractive index. The double negativity in acoustics is derived from low-frequency resonances; as in the case of electromagnetism; but the negative density and modulus are derived from a single resonance structure as distinct from electromagnetism in which the negative permeability and negative permittivity originates from different resonance mechanisms.

@article{citeulike:2329458, abstract = {We show here the existence of acoustic metamaterial; in which both the effective density and bulk modulus are simultaneously negative; in the true and strict sense of an effective medium. Our double-negative acoustic system is an acoustic analogue of Veselago’s medium in electromagnetism; and shares many unique consequences; such as negative refractive index. The double negativity in acoustics is derived from low-frequency resonances; as in the case of electromagnetism; but the negative density and modulus are derived from a single resonance structure as distinct from electromagnetism in which the negative permeability and negative permittivity originates from different resonance mechanisms.}, author = {Li, Jensen and Chan, C. T. }, citeulike-article-id = {2329458}, doi = {10.1103/PhysRevE.70.055602}, journal = {Physical Review E}, keywords = {metamaterial}, month = {November}, number = {5}, pages = {055602+}, posted-at = {2008-02-04 13:10:39}, priority = {2}, publisher = {American Physical Society}, title = {Double-negative acoustic metamaterial}, url = {http://dx.doi.org/10.1103/PhysRevE.70.055602}, volume = {70}, year = {2004} }

RIS record

TY - JOUR ID - citeulike:2329458 L3 - citeulike-article-id:2329458 TI - Double-negative acoustic metamaterial JF - Physical Review E VL - 70 IS - 5 SP - 055602 PB - American Physical Society N2 - We show here the existence of acoustic metamaterial; in which both the effective density and bulk modulus are simultaneously negative; in the true and strict sense of an effective medium. Our double-negative acoustic system is an acoustic analogue of Veselago’s medium in electromagnetism; and shares many unique consequences; such as negative refractive index. The double negativity in acoustics is derived from low-frequency resonances; as in the case of electromagnetism; but the negative density and modulus are derived from a single resonance structure as distinct from electromagnetism in which the negative permeability and negative permittivity originates from different resonance mechanisms. KW - metamaterial AU - Li, Jensen AU - Chan, CT PY - 2004/11/18/ UR - http://dx.doi.org/10.1103/PhysRevE.70.055602 ER -

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