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选取高品质因数的圆弓形散射元微腔构建耦合波导,通过改变散射元参数和耦合腔散射元平移等方法,得出光子晶体耦合腔波导结构的慢光变化规律,并实现很好平带下的极高群折射率。模拟结果显示,不同微腔个数的耦合波导,通过调整短轴/长轴之比和散射元平移等方式,不仅可以获得各种平带慢光曲线,还可以获得群折射率从4.10×104到1.35×105的超低慢光结构。
Choosing a high-quality circular arc-shaped scattering element microcavity to construct the coupled waveguide, the slow-light variation of the waveguide structure of the photonic crystal coupling cavity is obtained by changing the scattering element parameters and the coupling element scattering element translation, Very high group refractive index. The simulation results show that the coupling waveguides with different numbers of microcavities can not only obtain various flat-belt slow-light curves by adjusting the ratio of short axis / long axis and scattering element translation, but also obtain the average refractive index of the coupled waveguides from 4.10 × 104 To 1.35 × 105 ultra-low slow light structure.