Fig. 1From: Tunable Optical Performances on a Periodic Array of Plasmonic Bowtie Nanoantennas with Hollow CavitiesSchematic diagram of the simulation models. a A periodic array of plasmonic bowtie nanoantennas (PBNAs). b Simulation model of a unit cell. c Case 1, with a pair of bowtie-shaped MNPs. d Case 2, with three hollows in bowtie-shaped MNPs. e Case 3, with four hollows in bowtie-shaped MNPs. f Case 4, with six hollows in bowtie-shape MNPs. All simulation parameters are shown in the inset of this figureBack to article page