Research Article
Coupling of Photonic Crystal Surface Modes
Figure 4
(Color online) variation of the normalized coupling length, accompanied by its first derivative (a) and normalized group velocities (b) of the surface modes with frequency. Inset in (a) presents a closer look for . Dash-dotted vertical lines indicate the frequencies at which FDTD simulations are performed, whereas the hatched rectangular areas denote the frequency ranges over which surface mode coupling is not observed.
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