Fast tuning of Fano resonance in metal/phase-change materials/metal metamaterials
Fast tuning of Fano resonance in metal/phase-change materials/metal metamaterials
复制标题
金属/相变材料/金属超材料中法诺共振的快速调谐
DOI：
10.1364/ome.4.001775
复制
发表时间：
2014-09-01
影响因子：
2.8
通讯作者：
Cryan, Martin J.
中科院分区：
文献类型：
--
作者：
Cao, Tun;Wei, Chenwei;Cryan, Martin J.
我们提出了在三维超材料（MM）中快速调谐法诺共振（FR）的方法。MM由嵌入金属/相变材料(PCM)/金属多层的椭圆纳米孔阵列（ENA）组成。结果表明，当椭圆纳米孔占据矩形晶格的位置时，电磁共振干扰显著增强，从而提供了比方形晶格的ENA更高的品质因子(Q)值。通过切换PCM （Ge2Sb2Te5）的非晶态和晶态，FR峰可以红移高达42%。FR可以用持续时间为0.38 ns、强度为3.2 W/ μ m的超低能量中红外激光脉冲进行调谐(2)。(C) 2014年美国光学学会
We propose fast tuning of a Fano resonance (FR) in a three dimensional metamaterial (MM). The MM consists of an elliptical nanohole array (ENA) embedded through a metal/phase-change material (PCM)/metal multilayer. The results show that the interference between the electric and magnetic resonances can be significantly enhanced when the elliptical nanoholes occupy the sites of a rectangular lattice, thus providing a FR with a higher value quality factor (Q) compared to the ENA with a square lattice. By switching the PCM (Ge2Sb2Te5) between its amorphous and crystalline states, the FR peak can be red-shifted by up to 42%. The FR can be tuned with a ultra low energy mid-infrared laser pulse of 0.38 ns duration and an intensity of 3.2 W/mu m(2). (C) 2014 Optical Society of America