基于双鱼网结构的绿光波段超材料  

Metamaterials Composed of the Double-fishnet Structure at Green-light Band

作　　者：潘贞贞[1] 赵延[1] 王晓农[1] 罗春荣[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学应用物理系,智能材料实验室,西安710129

出　　处：《材料导报》2012年第10期19-22,共4页Materials Reports

基　　金：国家自然科学基金(50632030;50872113;50936002)

摘　　要：采用模板辅助化学电沉积法制备出中间介质层为PVA(聚乙烯醇)的双鱼网孔洞结构,透射测量发现在绿光波长550nm附近出现一个较低的透射峰。若在中间介质层中掺入活性介质Rh B,测得的透射峰位置基本保持不变,但是透射率增强了9%。随后又观测到在距离该样品约270nm处能实现平板聚焦,这比未掺杂Rh B的情况更明显。因此,掺杂Rh B的双鱼网结构能够在一定程度上降低损耗,使其具有良好的左手特性。Via template-assisted electrochemical deposition, the doubleffishnet structure metamaterials with PVA（polyvinyl alcohol） as the intermediate dielectric layer were fabricated. It is revealed that a low transmission peak exists at the wavelength of 550nm according to the transmission spectra. When the active medium Rh B is mixed in the intermediate dielectric layer, the measured transmission peak keeps immobile, but the transmission rate increases 9 %. Afterwards, the effect of planar focusing can be observed at the distance of about 270nm from the structure, which is more obvious than that of the sample without Rh 13. This confirms the double-fishnet structure with Rh B in its inter- mediate layer reduces the loss to some extent and has a better left-handed property.

关 键 词：超材料 双鱼网结构 绿光 平板聚焦 

分 类 号：O436[机械工程—光学工程]