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1 August 2021 Active-metasurfaces to realize tunable resonances and focusing
Taimoor Naeem, Hafiz Saad Khaliq, Tauseef Tauqeer, Muhammad Zubair, Muhammad Qasim Mehmood
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Proceedings Volume 11796, Active Photonic Platforms XIII; 117962T (2021) https://doi.org/10.1117/12.2595351
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
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Abstract
In this paper, we present electrically tunable metasurfaces that exhibit multifunctional characteristics in the visible domain by exploiting electro-optic effect (EO). The metasurfaces consist of an array of Barium Titanate (BTO) meta-atoms on an Indium Titanium oxide (ITO) coated substrate. The resonance wavelength of the metasurface can be tuned by varying the electric field that eventually alters the refractive index of material. The tunability of resonance wavelength is evaluated by a hologram that appears at the desired wavelength by changing its voltage. Furthermore, a zoom metalens is presented with focal length shift by applying different electric fields at the wavelengths of 488, 532 and 633 in nm. The proposed idea can be useful for realizing tunable integrated systems.
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Taimoor Naeem, Hafiz Saad Khaliq, Tauseef Tauqeer, Muhammad Zubair, and Muhammad Qasim Mehmood "Active-metasurfaces to realize tunable resonances and focusing", Proc. SPIE 11796, Active Photonic Platforms XIII, 117962T (1 August 2021); https://doi.org/10.1117/12.2595351
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KEYWORDS
Refractive index
Electro optics
Holography
Zoom lenses
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