Dispersion Engineered Nonlocal Metasurfaces with Customizable Wavefront-Selectivity

Yoshiaki Kasahara, Adam Overvig, Gengyu Xu, Andrea Alu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We propose and demonstrate nonlocal metasurfaces with wavefront-selective customizable features. In particular, we engineer in extreme ways the modal dispersion of metasurfaces, to go from positive to negative curvature across a flat dispersion regime. This result opens a new degree of freedom to selectively control metasurface responses, added to the already rich opportunities of nonlocal metasurfaces, such as frequency and polarization selectivity, as well as unitary-efficiency wavefront manipulation. We achieve customizable wavefront-selectivity by adding metallic via walls into bilayer nonlocal metasurfaces, which control the lateral energy transfer inside the metasurface while preserving the desired nonlocal properties imprinted in the bilayer. Based on these principles, we demonstrate highly-efficient wavefront-selective and wavefront-independent anomalous reflection and focusing, combined with frequency and polarization selectivity.

Original languageEnglish
Title of host publication2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023 - Proceedings
Pages1773-1774
Number of pages2
ISBN (Electronic)9781665442282
DOIs
StatePublished - 2023
Event2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023 - Portland, United States
Duration: 23 Jul 202328 Jul 2023

Publication series

NameIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume2023-July
ISSN (Print)1522-3965

Conference

Conference2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023
Country/TerritoryUnited States
CityPortland
Period23/07/2328/07/23

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