595646.fig.002a
(a)
595646.fig.002b
(b)
595646.fig.002c
(c)
Figure 2: (Color online) Optical guiding with an asymmetric slitgroove. (a) Schematic of the silver slitgroove. 𝐺 1 = 𝑔 1 = 5 0 0  nm, 𝐺 2 = 𝑔 2 = 3 2 0  nm, 𝑊 = 8 0  nm, 𝑑 = 4 0  nm, and 𝐻 = 3 0 0  nm. (immersed in water). (b) Electric field intensity showing the plasmonic beaming at off-axis. (c) Optical force vector map for the dotted region in (b).