Optical Manipulation with Plasmonic Beam Shaping Antenna Structures

Figure 2

(Color online) Optical guiding with an asymmetric slitgroove. (a) Schematic of the silver slitgroove. 𝐺₁=𝑔₁=500 nm, 𝐺₂=𝑔₂=320 nm, 𝑊=80 nm, 𝑑=40 nm, and 𝐻=300 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).

(a)

(b)

(c)