TY - JOUR
T1 - A biomimetic projector with high subwavelength directivity based on dolphin biosonar
AU - Zhang, Yu
AU - Gao, Xiaowei
AU - Zhang, Sai
AU - Cao, Wenwu
AU - Tang, Liguo
AU - Wang, Ding
AU - Li, Yan
N1 - Publisher Copyright:
© 2014 AIP Publishing LLC.
PY - 2014/9/22
Y1 - 2014/9/22
N2 - Based on computed tomography of a Yangtze finless porpoise's biosonar system, a biomimetic structure was designed to include air cavity, gradient-index material, and steel outer-structure mimicking air sacs, melon, and skull, respectively. The mainlobe pressure was about three times higher, the angular resolution was one order of magnitude higher, and the effective source size was orders of magnitude larger than those of the subwavelength source without the biomimetic structure. The superior subwavelength directivity over a broad bandwidth suggests potential applications of this biomimetic projector in underwater sonar, medical ultrasonography, and other related applications.
AB - Based on computed tomography of a Yangtze finless porpoise's biosonar system, a biomimetic structure was designed to include air cavity, gradient-index material, and steel outer-structure mimicking air sacs, melon, and skull, respectively. The mainlobe pressure was about three times higher, the angular resolution was one order of magnitude higher, and the effective source size was orders of magnitude larger than those of the subwavelength source without the biomimetic structure. The superior subwavelength directivity over a broad bandwidth suggests potential applications of this biomimetic projector in underwater sonar, medical ultrasonography, and other related applications.
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U2 - 10.1063/1.4896509
DO - 10.1063/1.4896509
M3 - Article
AN - SCOPUS:84907452316
SN - 0003-6951
VL - 105
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 12
M1 - 123502
ER -