中文摘要：

电磁超材料通常是由一些在介质基底表面上周期分布的亚波长谐振器组成的。它的特性在很大程度上取决于基底的性质和谐振器的结构细节。由于开口环谐振器（SRRs）可实现多种功能,因此在超材料中应用广泛。通过设计一种二维六边形SRRs阵列,利用时域有限差分方法（FDTD）研究了单元开口形式、单元周期和介质基底性质对其传输特性的影响。研究结果表明,开口形式可使超材料在1~2.5 THz处产生谐振响应,且介质基底的性质对该谐振特性的影响权重较大。

英文摘要：

Metamaterials are typically comprised by subwavelength resonators periodically distributed on the surface of some dielectric boarding substrates.Their features are largely determined by the properties of substrates and structural details of resonators.Split-ring resonators（SRRs） are extensively used in metamaterials because they can perform numerous functional tasks.In this paper,a 2D hexagonal SRRs array was designed and the effects of unit opening shape,unit cycle and dielectric properties of the embedding medium where the hexagonal SRRs reside on the transmission characteristics were analyzed.The results show that the opening shape can lead to the resonance response of metamaterials at 1-2.5 THz and the dielectric properties of the embedding medium have greater influences on the resonance characteristics.