Reversal of transmission and reflection based on acoustic metagratings with integer parity design.

Authors

Yangyang Fu
Chen Shen, Rowan UniversityFollow
Yanyan Cao
Lei Gao
Huanyang Chen
C T Chan
Steven A Cummer
Yadong Xu

Document Type

Article

Version Deposited

Published Version

Publication Date

5-24-2019

Publication Title

Nature Communications

DOI

10.1038/s41467-019-10377-9

Abstract

Phase gradient metagratings (PGMs) have provided unprecedented opportunities for wavefront manipulation. However, this approach suffers from fundamental limits on conversion efficiency; in some cases, higher order diffraction caused by the periodicity can be observed distinctly, while the working mechanism still is not fully understood, especially in refractive-type metagratings. Here we show, analytically and experimentally, a refractive-type metagrating which can enable anomalous reflection and refraction with almost unity efficiency over a wide incident range. A simple physical picture is presented to reveal the underlying diffraction mechanism. Interestingly, it is found that the anomalous transmission and reflection through higher order diffraction can be completely reversed by changing the integer parity of the PGM design, and such phenomenon is very robust. Two refractive acoustic metagratings are designed and fabricated based on this principle and the experimental results verify the theory.

Comments

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

Y. Fu et. al. Reversal of transmission and reflection based on acoustic metagratings with integer parity design. Nat Commun 2019 May 24;10(1):2326. doi: 10.1038/s41467-019-10377-9.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.