Polarization-Insensitive Medium-Switchable Holographic Metasurfaces

The adoption of metasurfaces has led to revolutionary advances in holography due to improved compactness, integrability, and performance. Switchable meta-holograms projecting different replay field images in a controllable manner are highly desirable. Still, existing technologies generally rely on t...

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Bibliographic Details
Published in:ACS photonics 2021-09, Vol.8 (9), p.2581-2589
Main Authors: Cai, Haogang, Dolan, James A, Gordon, George S. D, Chung, Taerin, López, Daniel
Format: Article
Language:English
Subjects:
all-dielectric
cost-effective
MATERIALS SCIENCE
meta-hologram
noninterleaved
transmissive
tunable metasurface
ultracompact
visible spectrum
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Summary:The adoption of metasurfaces has led to revolutionary advances in holography due to improved compactness, integrability, and performance. Switchable meta-holograms projecting different replay field images in a controllable manner are highly desirable. Still, existing technologies generally rely on the use of polarized light and additional optics to facilitate switching. Consequently, the potential benefits afforded through the use of metasurfaces are limited both by the system complexity and a fixed relationship between the optical input and output. In this manuscript, we demonstrate polarization-insensitive metasurfaces encoding arbitrary and independent holograms, which can be switched between by changing the refractive index of the infiltration medium while maintaining identical illumination conditions. By sidestepping the requirements for high-performance light sources, switching optics, or delicate alignment, this approach points toward ultracompact and cost-effective switchable meta-holograms for various practical applications, such as holographic image projection, eye-perceptible sensors, optical information storage, processing, and security.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.1c00836