声波晶体锐弯曲声导与亚波长成像
Acoustic guiding and subwavelength imaging with sharp bending by sonic crystal
摘要：
本文提出了一种通过截断声波晶体实现声波自准直的锐弯曲方案。本文研究了一种全角度、宽频带的90°弯曲波导，在很宽的入射角范围内对高斯光束都有近乎理想的传输。该结构还实现了对点光源的90°弯曲成像，亚波长分辨率为0.037 λ。这些结果将在声波晶体的声波操纵中找到适用性。
英文摘要：
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 0.37λ is also realized by the proposed structure. These results will find applicability in the manipulation of acoustic waves by sonic crystals.
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