Abstract
Negative group velocity dispersion (GVD) in the slow light region of the slot photonic crystal waveguide (PCW) is used to compensate the positive GVD of the conventional PCW. Through designing the proper structure, we plot the waveforms and field pattern of the light propagation in the waveguide. We find that the waveform gets broaden first for the positive GVD in conventional PCW and recovers through the slot PCW with the negative GVD. The light energy fades away as the light propagated along the PCW, but it can be well confined into the narrow slot, which may effectively enhance the interaction between slow light and the low-index waveguiding material filled in the slot. So the slot PCW can open the opportunities for wide applications such as optical dispersion compensation, optical delay line, and so on.
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