Investigation of Structural Effect on the Slowing of Light in Slotted Two- Dimensional Photonic Crystals

In this paper slow light properties in a photonic crystal waveguide were investigated and changing the radius of the adjacent rings of the slot were used for improving slow light properties. We have studied the characteristic of slotted photonic crystal waveguides slotted, then, by using the super cell method based on plane wave expansion method. For TE mode in a two-dimensional slotted photonic crystal with the symmetry of triangular lattice that has been formed of air rings in silicon background, by changing the radius of the first adjacent rings of the slot, we have achieved the group velocity of  and  in the bandwidth of nm and 11.2nm were achieved.