Figure 3 : The dimensions of the left and right rails required for achieving ZB at various geometries.

From: Polarisation independent silicon-on-insulator slot waveguides

Figure 3

Varying (a) the slot (h = 220 nm and θ = 0°), (b) the waveguide height (slot = 140 nm and θ = 0°), and (c) the slant angle θ (slot = 140 nm and h = 220 nm). For ease of comparison, note that the same geometry is denoted by the green line with diamonds in (a) and (b), and the red lines with circles in (c).