Figure 3

Optical field distributions at (a) input port with W = 3000 nm and λ = 1550 nm, (b) output port with W = 1120 nm and λ = 1550 nm, (c) input port with W = 3000 nm and λ = 2150 nm, and (d) output port with W = 1120 nm and λ = 2150 nm.