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13 March 2024 High-efficiency electrically tunable active metasurfaces
Ruzan Sokhoyan, Harry A. Atwater
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Proceedings Volume PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV; PC128960F (2024) https://doi.org/10.1117/12.3003565
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
We theoretically demonstrate electrically tunable metasurfaces, which can dynamically manipulate the wavefront of the reflected light in the near-infrared wavelength range with optical efficiencies > 80%. We achieve a dynamically tunable optical response by integrating a lithium niobate l(LNO) layer into the silicon-based resonant metasurface structure. By applying voltage, we achieve a dynamically tunable phase shift of 236 degrees when the refractive index of the LNO layer varies between 2.208 and 2.212. Finally, we analyze the beam steering performance of the designed metasurfaces. The designed metasurfaces could be useful for free space optical communications, light detection and ranging (LiDAR), and laser-based additive manufacturing.
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Ruzan Sokhoyan and Harry A. Atwater "High-efficiency electrically tunable active metasurfaces", Proc. SPIE PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV, PC128960F (13 March 2024); https://doi.org/10.1117/12.3003565
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KEYWORDS
Amorphous silicon
Beam steering
Gold
LIDAR
Silica
Reflectors
Refractive index
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