861569.fig.003a
(a)
861569.fig.003b
(b)
Figure 3: Laser-based TPL fabrication of metamaterials: (a) schematic of the TPL laser writing system, (b) SEM images of fabricated polymer-based plasmonic structures (i) cauliflowers; (ii) blocks; confocal microscope image of (iii) hexagonal ring structures; (iv) planar chiral Y structures with highlighted geometry; (v) donuts; SEM image of (vi) grating structure (adapted from [25]).