Cargando…
Reversal of transmission and reflection based on acoustic metagratings with integer parity design
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 me...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6534607/ https://www.ncbi.nlm.nih.gov/pubmed/31127119 http://dx.doi.org/10.1038/s41467-019-10377-9 |
_version_ | 1783421448086355968 |
---|---|
author | Fu, Yangyang Shen, Chen Cao, Yanyan Gao, Lei Chen, Huanyang Chan, C. T. Cummer, Steven A. Xu, Yadong |
author_facet | Fu, Yangyang Shen, Chen Cao, Yanyan Gao, Lei Chen, Huanyang Chan, C. T. Cummer, Steven A. Xu, Yadong |
author_sort | Fu, Yangyang |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-6534607 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-65346072019-05-28 Reversal of transmission and reflection based on acoustic metagratings with integer parity design Fu, Yangyang Shen, Chen Cao, Yanyan Gao, Lei Chen, Huanyang Chan, C. T. Cummer, Steven A. Xu, Yadong Nat Commun Article 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. Nature Publishing Group UK 2019-05-24 /pmc/articles/PMC6534607/ /pubmed/31127119 http://dx.doi.org/10.1038/s41467-019-10377-9 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Fu, Yangyang Shen, Chen Cao, Yanyan Gao, Lei Chen, Huanyang Chan, C. T. Cummer, Steven A. Xu, Yadong Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title | Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title_full | Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title_fullStr | Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title_full_unstemmed | Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title_short | Reversal of transmission and reflection based on acoustic metagratings with integer parity design |
title_sort | reversal of transmission and reflection based on acoustic metagratings with integer parity design |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6534607/ https://www.ncbi.nlm.nih.gov/pubmed/31127119 http://dx.doi.org/10.1038/s41467-019-10377-9 |
work_keys_str_mv | AT fuyangyang reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT shenchen reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT caoyanyan reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT gaolei reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT chenhuanyang reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT chanct reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT cummerstevena reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign AT xuyadong reversaloftransmissionandreflectionbasedonacousticmetagratingswithintegerparitydesign |