【摘 要】
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This study proposes a bi-layer windmill-shaped metamaterial that consists of resonators,with similar shapes,on both sides of a dielectric substrate.In this study,the second layer is rotated clockwise around the substrate normal at 90°and thereafter flippe
【机 构】
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School of Physics and Physical Engineering,Shandong Provincial Key Laboratory of Laser Polarization
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This study proposes a bi-layer windmill-shaped metamaterial that consists of resonators,with similar shapes,on both sides of a dielectric substrate.In this study,the second layer is rotated clockwise around the substrate normal at 90°and thereafter flipped in the first layer.Due to the introduction of a windmill-like shape,the resonant structures result in new resonant modes and thus can achieve multi-band high-efficiency cross-polarization conversions and asymmetric transmissions (ATs) for a linearly polarized incident plane wave with a maximum asymmetric parameter of 0.72.Depending on the geometric parameters of our windmill-shaped structures,the AT effects can be flexibly modulated in a broad multi-band from 160 THz to 400 THz,which has not been reported in previous studies.These outstanding AT effects provide potential applications in optical diodes,polarization control switches,and other nano-devices.
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