is studied in slow light frequency regime. We propose a structure that its transmission spectrum covers the high group-index frequencies near

the band edge. Also, by structural modifications, high transmission near to 95% is achieved in slow light...

In this paper, we design a waveguide on photonic crystal slab for propagation of low-dispersion slow light. By shifting the air holes adjacent to the waveguide, we obtain a photonic crystal waveguide with a group index of 25 in 25 nm bandwidth which...