Extending the angle range of high absorption of metasurfaces by adding a multilayered medium

Diana Maria Garza Agudelo*, Vicente Cutanda Henriquez, Cheol-Ho Jeong, Peter Risby Andersen, Martin Ibarias

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Surfaces consisting of periodic arrangements of resonators can be considered to be locally reacting, and thus have a limited range of angles for which they can achieve high absorption. In particular, achieving significant absorption in a wide angle range becomes more difficult in the region approaching grazing incidence. For some applications such as reflection control in disproportionate rooms, reflection control at large angles can be desirable. In this work, it is shown how the angle range of high absorption of periodic surfaces of resonators can be significantly extended by adding a multilayered media above them. Two cases are demonstrated, one that considers a single-frequency performance and another that considers the average performance over an octave band. The behavior of the surfaces is estimated analytically using the transfer matrix method and numerically using the finite element model.
Original languageEnglish
Title of host publicationProceedings of the 24th International Congress on Acoustics
Number of pages8
Publication date2022
Publication statusPublished - 2022
Event24th International Congress on Acoustics - Hwabaek International Convention Center, Gyeongju, Korea, Republic of
Duration: 24 Oct 202228 Oct 2022
Conference number: 24
https://ica2022korea.org

Conference

Conference24th International Congress on Acoustics
Number24
LocationHwabaek International Convention Center
Country/TerritoryKorea, Republic of
CityGyeongju
Period24/10/202228/10/2022
Internet address

Keywords

  • Oblique incidence absorption
  • Absorbing metasurface
  • Multilayered media

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