Dynamic transmission control based on all-dielectric Huygens metasurfaces
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy
- Vanderbilt Univ., Nashville, TN (United States). Dept. of of Electrical Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
- Vanderbilt Univ., Nashville, TN (United States). Dept. of of Mechanical Engineering
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. Finally, this approach provides a new avenue for high-speed and low-power modulation of dielectric metasurfaces.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1458357
- Journal Information:
- Optica, Journal Name: Optica Journal Issue: 7 Vol. 5; ISSN 2334-2536
- Publisher:
- Optical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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