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Adaptive elastic metasurfaces for wave front manipulation
Author(s): Shilong Li; Jiawen Xu; Jiong Tang
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Paper Abstract

In this research, by combining the concept of elastic metasurfaces with piezoelectric transducer with shunted circuitry, we investigate the designs of elastic metasurfaces, consisting of an array of piezoelectric transducers shunted with negative capacitance, which is capable of modulating wave fronts adaptively. In order to construct different adaptive elastic metasurfaces, different phase profiles along the interface can be framed through properly adjusting the negative capacitance values. Flat planar lenses for focusing transmitted A0 Lamb waves are achieved, and possess the flexibility of changing focal locations through electromechanical tunings. Additionally, nonparaxial self-bending beams with arbitrary trajectories and source illusion devices can also be accomplished owing to the free manipulation of phase shifts. With their versatility and tunability, the adaptive elastic metasurfaces could pave new avenues to a wide variety of potential applications, such as nondestructive testing, ultrasound imaging, and caustic engineering.

Paper Details

Date Published: 10 April 2018
PDF: 6 pages
Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105952K (10 April 2018); doi: 10.1117/12.2296783
Show Author Affiliations
Shilong Li, Univ. of Connecticut (United States)
Jiawen Xu, Univ. of Connecticut (United States)
Jiong Tang, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 10595:
Active and Passive Smart Structures and Integrated Systems XII
Alper Erturk, Editor(s)

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