A green-light gain-assisted metamaterial fabricated by self-assembled electrochemical deposition

Based on the fabrication of nanospheres self-assembled and electrochemical deposition, the high-quality double-fishnet metamaterials consisting of Ag-polyvinyl alcohol-Ag nanostructures on an indium tin oxide conductive glass substrate have been prepared, with a resonant pass band in the vicinity of 545-nm green-light wavelength. The active medium Rhodamine B (Rh B) was incorporated into metamaterial structure to overcome the inherent losses, and the experiments demonstrate that the transmission intensity of the sample doped with Rh B is enhanced evidently versus that of the sample without Rh B; this may provide another way towards the fabrication of gain-assisted low-loss visible metamaterials.