A Soft 3D Acoustic Metafluid with Dual-Band Negative Refractive Index.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26671783.
- Also identified by DOI 10.1002/adma.201503524.
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Abstract
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.