Figure 5

(a) Numerically calculated group refractive index versus frequency (b) and (c) depicts variation of group velocity versus frequency in the normally dispersive regimes of the 1st and 2nd transparency windows, respectively.

(a) Numerically calculated group refractive index versus frequency (b) and (c) depicts variation of group velocity versus frequency in the normally dispersive regimes of the 1st and 2nd transparency windows, respectively.