Acoustic beam control in biomimetic projector via velocity gradient

Xiaowei Gao, Yu Zhang, Wenwu Cao, Erqian Dong, Zhongchang Song, Songhai Li, Liguo Tang, Sai Zhang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A biomimetic projector (BioP) based on computerized tomography of pygmy sperm whale's biosonar system has been designed using gradient-index (GRIN) material. The directivity of this BioP device was investigated as function of frequency and the velocity gradient of the GRIN material. A strong beam control over a broad bandwidth at the subwavelength scale has been achieved. Compared with a bare subwavelength source, the main lobe pressure of the BioP is about five times as high and the angular resolution is one order of magnitude better. Our results indicate that this BioP has excellent application potential in miniaturized underwater sonars.

Original languageEnglish (US)
Article number013505
JournalApplied Physics Letters
Issue number1
StatePublished - Jul 4 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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