Dynamic transmission control based on all-dielectric huygens metasurfaces

Austin Howes, Wenyi Wang, Ivan Kravchenko, Jason Valentine

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

Abstract

Tunable metasurfaces open new doors for achieving dynamic wavefront manipulation in an ultracompact footprint. Dielectric metasurfaces are particularly attractive for this application due to their low-loss modes. However, their volumetric modes make them difficult to dynamically tune compared to plasmonic variants with strong field confinement. We overcome this challenge by combining dielectric resonators with an epsilon-near-zero (ENZ) mode in a thin film. By tuning the coupling between modes in the resonators and the ENZ thin film, active control over the transmittance amplitude is achieved. Operating at the wavelength of the Huygens mode, we demonstrate transmittance modulation with an on-state transmittance of 70% and a modulation depth of 31%. In addition, we create a tunable diffraction grating and demonstrate its potential use in beam steering applications. This approach provides a new avenue for high speed and low-power modulation of dielectric metasurfaces.

Original languageEnglish
Title of host publicationFrontiers in Optics, FIO 2018
PublisherOptica Publishing Group (formerly OSA)
ISBN (Print)9781943580460
DOIs
StatePublished - 2018
EventFrontiers in Optics, FIO 2018 - Washington, DC, United States
Duration: Sep 16 2018Sep 20 2018

Publication series

NameOptics InfoBase Conference Papers
VolumePart F114-FIO 2018
ISSN (Electronic)2162-2701

Conference

ConferenceFrontiers in Optics, FIO 2018
Country/TerritoryUnited States
CityWashington, DC
Period09/16/1809/20/18

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