Performance enhancement of photonic crystal slow-light devices

We design slow-light PhC structures based on the coupling of point defects. The performance of different enhanced coupled cavity waveguides are analyzed by using the tight binding (TB) approximation and the plane wave expansion (PWE) method. We show that light can be further slowed down by coupling high-Q cavities and that the delay line performance depends on the cavity symmetry. A group velocity of about 10^-4c can be achieved and the bit length is 300 times smaller than the corresponding parameter of a fiber delay line.