Abstract
We present the concept of acoustic metacoupler for broadband impedance match between two media with different impedances and cross sections. An implementation is demonstrated that produces spatial gradient of effective acoustic impedance by utilizing helical-like structure with continuously varying pitch instead of changing the cross-section or employing multiple layers. Numerical results verify the effectiveness of our design in achieving near-unity coupling efficiency in a broad band. We anticipate the proposed metacoupler with capability and flexibility to open route to broadband impedance matching and to have a wide realm of potential applications such as transducer design, acoustic imaging and energy harvesting.
Original language | English |
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Article number | 203504 |
Journal | Applied Physics Letters |
Volume | 110 |
Issue number | 20 |
DOIs | |
Publication status | Published - May 15 2017 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 Author(s).
ASJC Scopus Subject Areas
- Physics and Astronomy (miscellaneous)