Terahertz frequency selective surfaces using heterostructures based on two-dimensional diffraction grating of single-walled carbon nanotubes

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-03-11 DOI:10.1080/19475411.2022.2148307

P. Timoshenko, A. Lerer, S. Rochal

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引用次数: 1

Abstract

ABSTRACT For single-walled carbon nanotubes (SWCNTs) with a length of 1–50 µm, the surface plasmon-polariton (SPP) resonance is within the terahertz frequency range; therefore, SWCNT lattices can be used to design frequency-selective surface (FSS). A numerical model of electromagnetic wave diffraction on a two-dimensional periodic SWCNT lattice can be described by an integro-differential equation of the second-order with respect to the surface current along SWCNT. The equation can be solved by the Bubnov–Galerkin method. Frequency dependence of reflecting and transmitting electromagnetic waves for FSSs near the SPP resonance is studied numerically. It is shown that the resonances are within the lower-frequency part of the terahertz range. We also estimate the relaxation frequency of an individual SWCNT and demonstrate the applicability of the Kubo formula for graphene conductivity to array of strips similar in size to SWCNTs under consideration. Graphical abstracts

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基于单壁碳纳米管二维衍射光栅的异质结构太赫兹频率选择表面

对于长度为1 ~ 50µm的单壁碳纳米管(SWCNTs)，表面等离子体-极化子(SPP)共振在太赫兹频率范围内;因此，swcnts晶格可用于设计频率选择表面(FSS)。二维周期单壁碳纳米管晶格上电磁波衍射的数值模型可以用关于沿单壁碳纳米管表面电流的二阶积分-微分方程来描述。该方程可用布布诺夫-伽辽金方法求解。用数值方法研究了SPP谐振附近fss反射和发射电磁波的频率依赖性。结果表明，共振在太赫兹范围的低频部分。我们还估计了单个SWCNTs的弛豫频率，并证明了Kubo公式在考虑的与SWCNTs尺寸相似的条带阵列中石墨烯电导率的适用性。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.