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A Soft 3D Acoustic Metafluid with Dual‐Band Negative Refractive Index
Author(s) -
Raffy Simon,
Mascaro Benoit,
Brunet Thomas,
MondainMonval Olivier,
Leng Jacques
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201503524
Subject(s) - materials science , refractive index , index (typography) , dual (grammatical number) , optics , optoelectronics , physics , art , literature , world wide web , computer science
Spherical silica xerogels are efficient acoustic Mie resonators. When these sub‐wavelength inclusions are dispersed in a matrix, the final metafluid may display a negative acoustic refractive index upon a set of precise constraints concerning material properties, concentration, size, and dispersity of the inclusions. Because xerogels may sustain both pressure and shear waves, several bands with negative index can be tailored.