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首页> 外文会议>Conference on Conference on Photonics North >Critical comparison of three modal methods: bidirectional eigenmodeexpansion propagation method, aperiodic rigorous coupled modeanalysis, and harmonic expansion method
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Critical comparison of three modal methods: bidirectional eigenmodeexpansion propagation method, aperiodic rigorous coupled modeanalysis, and harmonic expansion method

机译：三种模态方法的关键比较：双向本征模扩展传播方法，非周期性严格耦合模分析和谐波扩展方法

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摘要

The performance of three bidirectional modal methods the "classical" bidirectional eigenmode expansion propagation method, the aperiodic rigorous coupled wave analysis (known also as the Fourier modal method), and the mode expansion method based on harmonic expansion are mutually compared using modeling tasks that include eigenmode calculation of a relatively high-contrast planar waveguide, spectral transmittance of a one-dimensional "photonic crystal" filter in a photonic wire, spectral transmittance of a surface plasmon based optical sensor, and a reflectance from a double-groove structure in a high-contrast waveguide. All methods exhibit generally comparable performance, as follows from good mutual agreement of the results and generally comparable computational time. Although all methods use perfectly matched layers as absorbing boundary conditions, their implementation in the aperiodic rigorous coupled wave analysis exhibits significantly stronger attenuation than that used in the other two methods. Thus, significant improvement of the latter methods seems possible.
机译：使用以下建模任务相互比较了三种双向模态方法的性能：“经典”双向本征模扩展传播方法，非周期性严格耦合波分析（也称为傅立叶模态方法）和基于谐波展开的模式扩展方法。相对高对比度平面波导的本征模计算，光子线中一维“光子晶体”滤光片的光谱透射率，基于表面等离激元的光学传感器的光谱透射率以及来自双槽结构的反射率对比波导。所有方法都表现出大致可比的性能，这是由于结果相互之间的良好一致性以及大致可比的计算时间所致。尽管所有方法都使用完全匹配的层作为吸收边界条件，但在非周期性严格耦合波分析中的实现比其他两种方法具有明显更强的衰减。因此，似乎有可能对后一种方法进行重大改进。

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