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Acoustic far-field focusing effect for two-dimensional graded negative refractive-index sonic crystals
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10.1063/1.3457447
/content/aip/journal/apl/96/26/10.1063/1.3457447
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/26/10.1063/1.3457447
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) The schematic representation of the GNRISC. (b) Zoom of the structure surrounded by the rectangular area with the dashed line in (a).

Image of FIG. 2.
FIG. 2.

Band structure of two different lattice spacing of the GNRISC. Inset picture shows the equifrequency contours for 0.75 MHz at different lattice spacing.

Image of FIG. 3.
FIG. 3.

Left panel: pressure field distribution of output wave in plane at 0.75 MHz (a) Experimental result. (b) Theoretical calculation. Right panel: normalized intensity distribution at focus plot along -axis (c) Experiment. (d) Theory. The dashed lines denote input source, the solid lines denote the results with perfect SC, and the dashed dotted lines denote the results with GNRISC.

Image of FIG. 4.
FIG. 4.

(a) The focal position of the GNRISC vs frequency (the triangular and circle dots denote the experimental and theoretical results). (b) The focal position of the GNRISCs vs the decrease step of lattice spacing .

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/content/aip/journal/apl/96/26/10.1063/1.3457447
2010-06-28
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acoustic far-field focusing effect for two-dimensional graded negative refractive-index sonic crystals
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/26/10.1063/1.3457447
10.1063/1.3457447
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