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12 April 2023 Terahertz ultra-wideband polarization conversion metasurfaces based on mutual coupling enhancement
Munan Yang, Feng Lan, Tianyang Song, Luyang Wang, Shun Wang, Xiao Zong, Yaxin Zhang, Ziqiang Yang
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Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 1256521 (2023) https://doi.org/10.1117/12.2662554
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China
Abstract
This paper presents an ultra-wideband polarization converter consisting of two dielectric substrate layers with interleaving metal gratings and a notched square octagon sandwiched in between. The device can convert the linear polarized waves into cross-polarized electromagnetic waves with a polarization conversion efficiency of over 80% in the 0.062-0.228 THz frequency band with a fractional bandwidth of 114.5%. In addition to the interlayer electromagnetic coupling principle and the enhancement from Fabry-Pérot-like interference, the efficiency of ultra-wideband polarization conversion benefits from the multiple resonances of the fold curves and the coupling enhancement due to the interleaving stacking of the resonators. The enhancement of efficiency by interleaving stacking of resonators and mutual coupling enhancement between resonators is a new idea for the design of broadband metasurfaces.
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Munan Yang, Feng Lan, Tianyang Song, Luyang Wang, Shun Wang, Xiao Zong, Yaxin Zhang, and Ziqiang Yang "Terahertz ultra-wideband polarization conversion metasurfaces based on mutual coupling enhancement", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 1256521 (12 April 2023); https://doi.org/10.1117/12.2662554
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KEYWORDS
Terahertz radiation
Resonators
Reflection
Metals
Electromagnetism
Near field
Polarization
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