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提出了一种新颖的结构——槽型光子晶体波导结构。槽型波导将光波禁锢在低折射率槽型区域内,不仅增加了光与物质相互作用的时间,同时也增强了光与物质相互作用的强度,从而增强了低折射率区域的慢光效应。利用平面波展开法进行仿真模拟,结果表明:通过调节槽型缺陷的宽度,槽型波导中波导模式相互作用强度增强,槽缺陷中的电场强度约为高折射率区域的12倍,具有很强的光控能力,获得群速度最小值1.55×10-3c。这一结果将为基于光子晶体的光学器件的设计和应用提供有效的理论支持。
A novel structure - slot photonic crystal waveguide structure is proposed. Groove-type waveguides confine light waves in the region of low refractive index trenches, which not only increases the time of interaction between light and matter, but also enhances the intensity of the interaction between light and matter and thus enhances the slow light effect in the region of low refractive index. The simulation results show that by adjusting the width of the groove defects, the interaction strength of the waveguide mode in the groove waveguide is enhanced, and the electric field strength in the groove defect is about 12 times higher than that in the high refractive index region. Light control ability, the minimum group speed 1.55 × 10-3c. This result will provide an effective theoretical support for the design and application of photonic crystal-based optics.