Abstract
Group velocity and dispersion property of slow light in one-dimensional photonic crystal with different defect layer thicknesses are studied. It is found that the increase of defect layer thickness will induce the decrease of group velocity, which is an advantage to the design of optical buffer. However, the dispersion slope is increased, inducing a limited factor to keep the shape of ultra-short pulses. Then the effect of slight violation of defect layer thicknesses, refractive index and incident angle on the slow light is studied. The result shows that these influences are smaller at the first gap which is useful for the practical uses.
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