Metamaterial absorbers display potential applications in the field of photonics and have been investigated extensively during the last decade. We propose a dual-band resonant metamaterial absorber with right-angle shaped elements (RAEs) in the terahertz range based on numerical simulations. The absorber remains insensitive to a wide range of incidence angles (0°–70°) by showing a minimum absorbance of ~80% at 70°. Furthermore, the proposed absorber is highly independent on any state of polarization of the incidence electromagnetic wave due to the high absorbance, i.e., greater than 80%, recorded for the considered polarization states. To further comprehend the slight variations in absorbance as a function of change in the angle of incidence, the impedance of the structure has been critically examined. The metamaterial absorber is simple in design, and we provide a possible path of fabrication.

中文翻译：

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太赫兹中的双角超材料吸收器为直角形元素

超材料吸收器在光子学领域显示出潜在的应用，并且在过去十年中进行了广泛的研究。我们基于数值模拟，提出了在太赫兹范围内具有直角形元素（RAE）的双频谐振超材料吸收器。吸收剂在70°时表现出约80％的最小吸收率，因此对宽范围的入射角（0°–70°）保持不敏感。此外，由于针对所考虑的偏振态​​记录的高吸收率，即大于80％，所提出的吸收体高度独立于入射电磁波的任何偏振态。为了进一步理解吸光度随入射角变化的微小变化，已经对结构的阻抗进行了严格的检查。超材料吸收器设计简单，