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.
Conference Committee Involvement (4)
Infrared, Millimeter-Wave, and Terahertz Technologies XI
12 October 2024 | Nantong, Jiangsu, China
Infrared, Millimeter-Wave, and Terahertz Technologies X
15 October 2023 | Beijing, China
Infrared, Millimeter-Wave, and Terahertz Technologies IX
5 December 2022 | Online Only, China
Infrared, Millimeter-Wave, and Terahertz Technologies VIII
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