The properties and structure optimization of slot photonic crystal waveguide

The properties of the guide mode by adjusting the widths of the air-slot and the radii of the air-holes in the first and second rows have been studied respectively in the slot photonic crystal waveguide (PCW). It is very interesting that the guide mode´s shifts to the high frequencies as increasing the width of air-slot, the radii of air holes in the first two rows adjacent to the waveguide. We set the appropriate these parameters to optimize the slot PCW obtaining single guide mode. The optimized slot PCW confines the light very well in the slot region by analyzing the filed distribution and transmission compared to the conventional slot PCW. These results provide theory basis for the further research on the slot PCW, especially the sensor and dispersion compensator.