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中国物理学会期刊

二维介质柱光子晶体波导吸收边界条件

CSTR: 32037.14.aps.54.5677

Absorbing boundary conditions for two-dimensional photonic crystal waveguides

CSTR: 32037.14.aps.54.5677
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  • 设计优化了用于截断二维正方格子介质柱光子晶体波导的分布布拉格反射波导的结构.二维时域有限差分数值模拟结果显示,在上述两种波导联接处的反射系数可以在大部分光子晶体波导导波的频谱范围内降到1%以下.将这种分布布拉格反射波导和通常的吸收边界条件相结合可以构成用于光子晶体波导的吸收边界条件,其反射率可以降低到-40dB以下,吸收层的厚度可取为晶格长度的1.3倍.

     

    We designed a distributed Bragg reflector waveguide for terminating the square lattice dielectric cylinder photonic crystal waveguide and evaluated the reflection of their interface numerically. The reflection coefficient was reduced to below 1% in a large part of the frequency range of the guided mode.

     

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