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Experimental realization of broadband tunable resonators based on anisotropic metafluids
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Schematic view of a radially periodic structure employed in Ref. 12 to develop cylindrically anisotropic metafluids (left) and its physical realization (right). (b) Schematic view of the periodic structure studied in this letter (left) together with its physical realization (right).

Image of FIG. 2.
FIG. 2.

Spectra taken inside the cavity made of corrugated samples with different ratios . The peaks correspond to resonances with different polar symmetry. Note that the frequency of dipolar mode is redshifted by decreasing the ratio while the frequency of monopolar mode is kept constant.

Image of FIG. 3.
FIG. 3.

Spectra simultaneously taken in two acoustic cavities with identical diameters; one contains an isotropic fluid (air) and the other contains a metafluid with anisotropy factor . The inset shows a picture of the cavities’ substrates both drilled on the same aluminum plate.

Image of FIG. 4.
FIG. 4.

Symbols with error bars represent experimental data for the components of the sound speed tensor relative to that of the background (circles and squares) and the anisotropy factor (triangles). Lines give the values obtained by the analytical model. Note that lines describing the behavior for and overlap.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental realization of broadband tunable resonators based on anisotropic metafluids