Gorokhov G V, Bychanok D S, Kuzhir P P, Gorodetskiy D V, Kurenya A G, Sedelnikova O V, Bulusheva L G, Okotrub A V
Institute for Nuclear Problems, Belarusian State University, 11 Bobruiskaya str., 220030, Minsk, Belarus. Physics Faculty, Vilnius University, Sauletekio 9, Vilnius LT-10222, Lithuania.
Nanotechnology. 2020 Apr 3;31(25):255703. doi: 10.1088/1361-6528/ab7efa. Epub 2020 Mar 11.
Here a simple and reproducible method for obtaining terahertz metasurfaces formed from multiwall carbon nanotubes (MWCNTs) is presented. The metasurfaces were obtained from a vertically aligned array of MWCNTs using a laser engraving technique followed by polymer covering. The structures under study demonstrate frequency-selective reflection in terahertz range following the Huygens-Fresnel formalism. For a normal incidence of the electromagnetic wave, the model for numerical calculation of backscattering from the metasurfaces was proposed. Lightweight and compact MWCNT-based metasurfaces are capable to replace conventional pyramidal absorbers and could serve as a versatile platform for scalable cost-efficient production of ultra-light electromagnetic components for THz applications.
本文提出了一种简单且可重复的方法来制备由多壁碳纳米管（MWCNT）构成的太赫兹超表面。这些超表面是通过激光雕刻技术，然后进行聚合物覆盖，从垂直排列的MWCNT阵列获得的。所研究的结构遵循惠更斯 - 菲涅耳原理，在太赫兹范围内表现出频率选择性反射。对于电磁波的垂直入射，提出了超表面后向散射数值计算的模型。基于MWCNT的轻质且紧凑的超表面能够替代传统的金字塔形吸收器，并可作为一个通用平台，用于可扩展的、具有成本效益的太赫兹应用超轻电磁组件的生产。
