Via template-assisted electrochemical deposition, the double-fishnet 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 550nra according to the transmission spectra. When the active medium Rh B is mixed in the intermediate dielectric layeri 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 27Onm from the structure, which is more obvious than that of the sample without Rh B. This confirms the double-fishnet structure with Rh B in its intermediate layer reduces the loss to some extent and has a better left-handed property.%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RhB的情况更明显.因此,掺杂RhB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.
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