Volume 125, Number 5, March 2019
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||17 April 2019|
Reflected wavefront manipulation by acoustic metasurfaces with anisotropic local resonant units
School of Mathematics and Physics, China University of Geosciences - Wuhan, China
Received: 6 November 2018
Accepted: 5 March 2019
In this work, we develop a new gradient acoustic metasurface to manipulate reflective wavefronts arbitrarily. Each unit of the gradient metasurface is constructed of a locally anisotropic resonant structure, comprising a steel cylinder with an elliptical rubber coating embedded in epoxy. Phase shifts of the reflected wave over the full range provided by different units can be realized by selecting the radius of the steel cylinder. With an appropriate design of the phase profiles along the acoustic metasurface, we can achieve anomalous reflection, a planar acoustic lens, and an acoustic cloak. The locally anisotropic resonant units have significant potential for engineering and manipulating acoustic wavefronts.
PACS: 43.20.El – Reflection, refraction, diffraction of acoustic waves / 43.40.+s – Structural acoustics and vibration
© EPLA, 2019
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.