Fig. 4From: Electric field enhancement of coupled plasmonic nanostructures for optical amplification a, b SEM image of the Si mold. c SEM image of adhesive tape. As shown in (c, d), Ag was peeled off the mold because it was required for selective deposition on the nanostructure. e, f SEM image of the final MPN. e shows Ag selectively deposited on the polymeric nanostructureBack to article page