Figure 5

Designed plasmonic vortex lenses.
(a), (b) and (c) The theoretical curves of the gold/quartz interface with m = 4, 7 and 10, respectively, calculated with eq.3. (d), (e) and (f) The designed PVLs with m = 4, 7 and 10, respectively.
Designed plasmonic vortex lenses.
(a), (b) and (c) The theoretical curves of the gold/quartz interface with m = 4, 7 and 10, respectively, calculated with eq.3. (d), (e) and (f) The designed PVLs with m = 4, 7 and 10, respectively.