The voyage of the research in terahertz (THz) technology has an intriguing application in terahertz detection, and the graphene absorbers have dramatically enhanced the effectivity, and the efficiency in its performance. Though, there is a need of wide angle insensible, polarization angle insensible, broadband terahertz metamaterial absorber (TMA) with reduced design complexity. Hence, in this research an effort has been carried out to develop such TMA with equivalent circuit modelling approach. A massive − 10 dB reflection coefficient (RC) bandwidth of 2.66 THz (1.08–3.74 THz) has been obtained by the proposed TMA device with two significant peaks of − 19.48 dB and − 14.5 dB at 1.32 THz and 3.44 THz, respectively. The oblique incidence stability of the device has been verified by investigating the effect of wave incidence angle, and wave polarization angle in RC characteristic. Further, the physics behind the absorption has been systematically illustrated along with three different absorption mechanism, i.e., input-impedance matching mechanism, wave interference phenomena, and induced current model, that attest the Unprecedented absorption results. Moreover, the electrical parameters of the device (i.e., effective electric permittivity, and effective magnetic permeability) have been extracted to analyze the metamaterial behavior of the device. The results are good enough to explore the potential of the TMA for THz sensing applications.

中文翻译：

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石墨烯分形频率选择表面加载太赫兹吸收器的研究

太赫兹 (THz) 技术研究的航行在太赫兹检测中具有有趣的应用，石墨烯吸收体显着提高了其效率和性能。但是，需要具有降低设计复杂性的广角不敏感、偏振角不敏感、宽带太赫兹超材料吸收器（TMA）。因此，在这项研究中，努力开发具有等效电路建模方法的 TMA。提议的 TMA 设备获得了 2.66 THz (1.08–3.74 THz) 的大量 − 10 dB 反射系数 (RC) 带宽，两个显着峰值分别为 1.32 THz 和 3.44 THz 处的 − 19.48 dB 和 − 14.5 dB。通过研究波入射角的影响，验证了装置的斜入射稳定性，和 RC 特性中的波极化角。此外，吸收背后的物理原理与三种不同的吸收机制，即输入阻抗匹配机制、波干涉现象和感应电流模型一起被系统地说明，证明了前所未有的吸收结果。此外，还提取了器件的电气参数（即有效介电常数和有效磁导率）以分析器件的超材料行为。结果足以探索 TMA 在太赫兹传感应用中的潜力。和感应电流模型，证明了前所未有的吸收结果。此外，还提取了器件的电气参数（即有效介电常数和有效磁导率）以分析器件的超材料行为。结果足以探索 TMA 在太赫兹传感应用中的潜力。和感应电流模型，证明了前所未有的吸收结果。此外，还提取了器件的电气参数（即有效介电常数和有效磁导率）以分析器件的超材料行为。结果足以探索 TMA 在太赫兹传感应用中的潜力。