Wavefront rerouting with super-grating metasurfaces

D. L. Sounas, Y. Radi, H. Chalabi, A. Alu

Research output: Chapter in Book/Entry/PoemConference contribution

Abstract

Gradient metasurfaces have received significant attention in the past few years, due to their potential for advanced wave manipulation over a thin surface. Following the first, largely inefficient proposals to pattern the impinging wavefront by nanostructuring a plasmonic metasurface, to date there are several elegant approaches to design metasurfaces that can imprint a pattern of choice to the impinging wavefront with large resolution. These approaches typically consist of discrete implementations of the continuous surface impedance profile ideally required to convert a certain wavefront into the desired one, and they all appear to provide a trade-off between efficiency and complexity. Here, on the contrary, we introduce the concept of super-grating metasurfaces, based on which one can arbitrarily steer an impinging beam with unitary efficiency by relying on specifically tailored asymmetric resonances within each unit cell of a suitably designed periodic grating. Our theory shows that broadband anomalous reflection and transmission does not necessarily require the use of continuous spatial gradients of surface impedance, but they can be achieved by suitably designed periodic arrays of resonant particles with specifically tailored asymmetric responses. In addition to their theoretical importance, these results can be important for the design of efficient metasurfaces based on simple and realizable principles.

Original languageEnglish (US)
Title of host publication2017 11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages13-15
Number of pages3
ISBN (Electronic)9781538637685
DOIs
StatePublished - Nov 14 2017
Externally publishedYes
Event11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017 - Marseille, France
Duration: Aug 28 2017Sep 2 2017

Publication series

Name2017 11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017

Conference

Conference11th International Congress on Engineered Material Platforms for Novel Wave Phenomena, Metamaterials 2017
Country/TerritoryFrance
CityMarseille
Period8/28/179/2/17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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