Figure 3.

Simulation results for field distribution (snapshot in time) of $E_y$ for a molecule emitting in the center of the narrow channel of Figure 1 at the cut-off wavelength ${\lambda }_0=750nm$ for: (a) the scenario of Figure 1, (b) the same geometry, but with no side walls; (c) absence of the narrow channel. For this example: $a_{ch}=20nm$, $b=200nm$, $t=300nm$, $l_{ch}=2\mu m$. Similar results are shown in [9], but here different scales are used to highlight the phase variation along the channels for three different scenarios.