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Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal

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3 Author(s)
Li, Bo ; Department of Physics, Jishou University, Jishou, 416000 Hunan, China ; Deng, Ke ; Zhao, Heping

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A sharp bending scheme for the self-collimation of acoustic waves is proposed by simply truncating the sonic crystals. An all-angle and wide-band 90°-bending wave guide is demonstrated with nearly perfect transmissions for Gaussian beams at a wide range of incident angles. A 90°-bended imaging for a point source with a subwavelength resolution of 0.37 λ0 is also realized by the proposed structure. These results will find applicability in the manipulation of acoustic waves by sonic crystals.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 5 )