We propose a type of phase transition-based analogous S-type bilayer metamaterial to investigate the tun-able asymmetric transmission of terahertz metamaterial.A finite integral algorithm is used to solve the polarization properties.The phase transition of embedded vanadium dioxide films enables frequency-tunable dual-polarization asymmetric transmission.Furthermore,the asymmetric transmission property of 45° linearly polarized light may maintain a high efficiency over a wide range of incident angles.The efficiency is more than 0.4 at an incident angle of 60°.Moreover,the resonant frequency almost remains constant in the insulating and metallic states,and the tun-ability of the resonant frequency is 16.3%.The proposed frequency-tunable dual-polarization asymmetric transmis-sion component has potential application prospects in the fields of polarization control,terahertz communication,and terahertz chips.
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