基于单负超材料的高品质因数亚波长谐振腔

High Q-factor Subwavelength Cavity Resonator Based on Single-Negative Metamaterials

首先对由两种单负超材料组成的异质结的传输特性进行了研究,发现该异质结具有谐振腔功能和亚波长特性。然后对该亚波长谐振腔品质因数的增强进行了研究,发现当在由两种单负超材料组成的异质结界面处引入类电磁感应透明超材料原胞时,谐振腔的品质因数得到大幅增强,从而获得了一种具有高品质因数特点的亚波长谐振腔。该谐振腔将有助于微波及更高频段元器件的小型化。

Firstly,the transmission properties of the heterostructure constructed by two kinds of single-negative metamaterials were investigated and the results showed that the single-negative metamaterial heterostructure can play the role of the subwavelength cavity.In addition,the enhancement of the Q-factor of the subwavelength cavity was also studied and it was found that the Q-factor of the subwavelength cavity can be greatly increased when the electromagnetically-induced-transparency-like metamaterial unit is loaded at the interface of the single-negative metamaterial heterostructure.Therefore,a high Q-factor subwavelength cavity was realized based on the single-negative metamaterials.The cavity may be useful for miniaturization of devices and elements in microwave or higher frequency range.