Figure 2
From: Bloch surface eigenstates within the radiation continuum
Schematics for the set-up of temporal coupled-mode theory. Inside the bandgap, the bulk photonic crystal reflects all incoming light, so in our analysis we treat the photonic crystal as a reflecting boundary. In temporal coupled-mode theory, the localized mode has amplitude A, which is coupled to the incoming and outgoing waves with amplitudes 
and 
, respectively. Dashed lines indicate the reference planes for the phase of 
.
