Fig. 2From: Electric field enhancement of coupled plasmonic nanostructures for optical amplificationDN, BN, GN, and MPN simulation data. a shows the DN results. b shows the BN results. c shows the GN results. d shows the MPN results. The proposed plasmonic nanoantenna enhances the electric field in the middle of the structure, and the electric field enhancement is 15 times greater than that of the DN and GNBack to article page