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Full-vectorial analysis of high-index-contrast coupled channel waveguides

机译:高折射率对比耦合通道波导的全矢量分析

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摘要

Coupling of two identical channel waveguides separated by an air gap is analyzed. The coupled structure exhibits a strong refractive index contrast in both the transverse and longitudinal dimensions, which necessitates the use of a full-vectorial model. The 3D full-vectorial bidirectional method-of-lines beam propagation is utilized for this purpose. The effect of the transverse and longitudinal displacements on the modal reflectivity and modal transmissivity of the fundamental TE-like and TM-like modes is reported. Numerical results are presented for both the full-vectorial model and the approximate semivectorial model. A significant difference between the predictions of these two models is seen.
机译:分析了由气隙隔开的两个相同的通道波导的耦合。耦合的结构在横向和纵向尺寸上都表现出很强的折射率对比,因此必须使用全矢量模型。为此,使用了3D全矢量双向线束传播。报道了横向和纵向位移对基本TE型和TM型模态的模态反射率和模态透射率的影响。给出了全矢量模型和近似半矢量模型的数值结果。可以看到这两个模型的预测之间存在显着差异。

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