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结构参数对二维ArchimedesA7晶格光子晶体禁带的影响

Keywords: 光子晶体,平面波展开法,ArchimedesA7晶格,完全光子禁带

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Abstract:

利用平面波展开法研究了空气背景中介质圆柱和方柱构造的二维ArchimedesA7晶格光子晶体的禁带结构随介质折射率、填充比的变化关系进行了研究,并进一步计算了介质方柱的旋转角度对完全光子禁带宽度的影响。研究发现,介质圆柱构造的ArchimedesA7晶格结构在介质柱折射率最低为n=2.40时就出现完全光子禁带,当n=2.60时禁带宽度达到最大值。介质方柱构造的ArchimedesA7晶格结构在介质柱折射率n=3.80时完全禁带宽度达到最大值,且随着折射率的增加禁带宽度变化很小;在介质方柱折射率恒定情况下,其最大禁带宽度与旋转角度无关,但旋转后出现完全禁带的填充比范围明显扩大。

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