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提出了一种新的手征结构,该结构由介质板及其上下表面的双L谐振器组成.仿真结果表明,该结构在THz波段可实现对x-极化波的宽频段、多频段的90°极化偏转.特别是在2.56 THz处,这种新的结构能够实现对线极化波(x-极化波和y-极化波)的90°极化偏转,而此时的椭圆度约为0°.基于线极化波的电场分布,详细分析了极化偏转的物理机制.理论上,该手征结构也可以用来设计微波波段或近红外波段的90°极化偏转器.
A new chiral structure is proposed, which consists of a dielectric slab and a double-L resonator on its upper and lower surfaces. The simulation results show that this structure can realize wideband, multi-band 90 ° polarization deflection, especially at 2.56 THz, this new structure enables 90 ° polarization deflection of linearly polarized waves (x-polarization and y-polarization) while ellipses The degree of polarization is about 0. Based on the electric field distribution of linearly polarized waves, the physical mechanism of polarization deflection is analyzed in detail.In theory, the chiral structure can also be used to design a 90 ° polarization deflector in microwave or near infrared .