Horn-like space-coiling metamaterials toward simultaneous phase and amplitude modulation.

ABSTRACT: Acoustic metasurfaces represent a family of planar wavefront-shaping devices garnering increasing attention due to their capacity for novel acoustic wave manipulation. By precisely tailoring the geometry of these engineered surfaces, the effective refractive index may be modulated and, consequently, acoustic phase delays tuned. Despite the successful demonstration of phase engineering using metasurfaces, amplitude modulation remains overlooked. Herein, we present a class of metasurfaces featuring a horn-like space-coiling structure, enabling acoustic control with simultaneous phase and amplitude modulation. The functionality of this class of metasurfaces, featuring a gradient in channel spacing, has been investigated theoretically and numerically and an equivalent model simplifying the str

SUBMITTER: Ghaffarivardavagh R 

PROVIDER: S-EPMC5893611 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature