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超材料吸波体通常是由一些在介质基底表面上周期分布的亚波长开口环谐振器(SRRs)组成,它们的吸收率在很大程度上取决于顶层SRRs的结构细节及介质的材料性质。利用时域有限积分法(FITD)对太赫兹波的超材料吸波体进行传输特性研究,分析了PI介质厚度、单元尺寸、开口环谐振器宽度、顶层silicon的电导率和PI介质的介电常数对太赫兹波超材料吸波体吸收峰位置和吸收率大小的影响。此超材料吸波体的特性研究对太赫兹波调制器、滤波器、吸收器及偏振器等器件设计和制备具有一定的指导意义。
Metamaterial wave absorbers are usually composed of sub-wavelength ring-opening ring resonators (SRRs) that are periodically distributed on the surface of the dielectric substrate. Their absorption rate depends greatly on the structural details of the top-layer SRRs and the material properties of the medium. Transmission characteristics of terahertz wave metamaterial wave absorbers were studied by finite-difference time-domain (FITD) method. The effects of PI dielectric thickness, cell size, open-ring resonator width, conductivity of top silicon and dielectric Effect of Constants on the Position and Absorption Rate of Absorption Peaks of Terahertz Materials. The study of the characteristics of this metamaterial wave absorber has certain guiding significance for the design and preparation of devices such as terahertz wave modulators, filters, absorbers and polarizers.