论文标题
Terahertz频率选择性表面使用基于单壁碳纳米管的二维衍射光栅的异质结构
Terahertz frequency selective surfaces using heterostructures based on two-dimensional diffraction grating of single-walled carbon nanotubes
论文作者
论文摘要
对于长度为1-50 nm的单壁碳纳米管（SWCNT），表面等离子体 - 孔子（SPP）共振在Terahertz频率范围内；因此，SWCNT晶格可用于设计频率选择表面（FSS）。二维周期性SWCNT晶格上电磁波衍射的数值模型可以通过二阶的全差方程相对于沿SWCNT的表面电流来描述。该方程可以通过Bubnov-Galerkin方法求解。数值研究了在SPP共振附近的FSS的反射和传输电磁波的频率依赖性。结果表明，共振位于Terahertz范围的低频部分。另外，我们估计单个SWCNT的松弛频率，并证明了久保公式在石墨烯电导率上的适用性，用于与正在考虑的SWCNT相似的一系列条带。
For single-walled carbon nanotubes (SWCNTs) with a length of 1-50 nm, the surface plasmon-polariton (SPP) resonance is within the terahertz frequency range; therefore, SWCNT lattices can be used to design frequency-selective surface (FSS). The 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 are studied numerically. It is shown that the resonances are within the lower-frequency part of the terahertz range. Also, we 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 with SWCNTs under consideration.
