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Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) The lowest band for the SC considered here. The frequency is normalized to , where is the speed of acoustic wave in water. (b) The EFCs at selected frequencies near the top of the first band. The dashed circle is the EFC of water at frequency 0.115.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Refraction of three wave vectors from a source into SC through directed interface. (b) Total bending of collimated waves in SC at a directed interface. (c) Refraction of the bended waves into a source-like image again at another directed interface.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Pressure field distribution for a vertically illuminated Gaussian beam at frequency 0.115. (b) Bending efficiency for vertically illuminated Gaussian beams with different frequencies.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Pressure field distribution for a Gaussian beam at frequency 0.115 with incident angle . (b) Bending efficiency for Gaussian beams at frequency 0.115 with different incident angles.

Image of FIG. 5.
FIG. 5.

(Color online) (a) Pressure field distribution of a point source placed away from the under surface of a truncated SC lens. (b) Transverse field distribution at the imaging plane of (a).


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Scitation: Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal