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Polarization insensitive terahertz metamaterial absorber

机译:极化不灵敏的太赫兹超材料吸收体

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摘要

We present the simulation, implementation, and measurement of a polarization insensitive resonant metamaterial absorber in the terahertz region. The device consists of a metal/dielectric-spacer/metal structure allowing us to maximize absorption by varying the dielectric material and thickness and, hence, the effective electrical permittivity and magnetic permeability. Experimental absorption of 77percent and 65percent at 2.12THz (in the operating frequency range of terahertz quantum cascade lasers) is observed for a spacer of polyimide or silicon dioxide respectively. These metamaterials are promising candidates as absorbing elements for thermally based terahertz imaging.
机译:我们介绍了太赫兹区域中偏振不敏感的谐振超材料吸收体的仿真,实现和测量。该器件由金属/介电间隔物/金属结构组成,通过改变介电材料和厚度以及有效的介电常数和磁导率,可以使吸收最大化。分别在聚酰亚胺或二氧化硅隔离层上观察到在2.12THz(在太赫兹量子级联激光器的工作频率范围内)的77%和65%的实验吸收。这些超材料有望成为基于热太赫兹成像的吸收元素。

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