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Vanadium nitride-based ultra-wideband nearly perfect metamaterial absorber
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2021-09-01 , DOI: 10.1117/1.jnp.15.036007
Essam M. Sheta 1 , Pankaj K. Choudhury 1
Affiliation  

Vanadium nitride (VN)-based metamaterial absorber was investigated for ultra-wideband (UWB) nearly perfect absorber in the visible to infrared regime of the electromagnetic spectrum considering four different VN samples, namely VN6, VN8, VN10, and VN12. The absorption properties were extracted for the transverse electric and transverse magnetic incidence waves under different obliquities, and also, considering different parametric conditions of the metamaterial. The constitutive properties of VN samples were initially extracted, followed by the effective constitutive properties of metasurface comprising the nanostrips of VN6 and VN10 mediums as the illustrative examples. The results determine achieving nearly perfect UWB absorption in the stated regime of operating wavelength. Spectral characteristics were also obtained while using other reflectors at the bottom. The results demonstrate using VN at the bottom yields significantly improved spectral features. The absorption related results were also evaluated exploiting the interference theory, and the obtained discrepancies were highlighted.

中文翻译:

氮化钒基超宽带近乎完美的超材料吸收体

考虑到四种不同的 VN 样品,即 VN6、VN8、VN10 和 VN12,研究了基于氮化钒 (VN) 的超材料吸收器在电磁光谱的可见到红外范围内的超宽带 (UWB) 近乎完美的吸收器。对不同倾角下的横向电和横向磁入射波的吸收特性进行了提取,并考虑了超材料的不同参数条件。最初提取了 VN 样品的本构特性,然后是包含 VN6 和 VN10 介质的纳米带的超表面的有效本构特性作为说明性示例。结果确定在规定的工作波长范围内实现近乎完美的 UWB 吸收。在底部使用其他反射器时也获得了光谱特性。结果表明,在底部使用 VN 可以显着改善光谱特征。还利用干涉理论评估了与吸收相关的结果,并强调了所获得的差异。
更新日期:2021-09-06
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