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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers & Short Notes >Photonic Crystal Slabs with Hexagonal Optical Atoms and Their Application in Waveguides
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Photonic Crystal Slabs with Hexagonal Optical Atoms and Their Application in Waveguides

机译：具有六角形光学原子的光子晶体平板及其在波导中的应用

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摘要

The standard plane wave expansion (PWE) method with the supercell method was used to calculate the band diagrams of photonic crystal slabs (PCSs) with hexagonal optical atoms. A hole-type PCS with hexagonal optical atoms has almost the same width of first band gap for the TE-like mode as its two-dimensional (2D) counterpart. However, the first band gap of a pillar-type PCS with hexagonal optical atoms shrinks considerably compared with that of its 2D counterpart. The hole-type PCS with normal hexagonal optical atoms has a slightly wider first band gap for TE-like modes than does that with orthogonal hexagonal optical atoms. PCSs with normal and orthogonal hexagonal optical atoms have band gaps that can be compared to those of PCSs with circular optical atoms. Hence they are appropriate structures for fabricating PC devices. The dispersion curves of line-defect PC waveguides were also calculated by the PWE method with the supercell method and several potential methods for modulating their dispersion curves were also discussed. Modulating the width of the line defect and the size of the optical atoms along the line defect were proved to be effective ways for obtaining a single-mode line-defect PC waveguide with a large bandwidth.
机译：使用标准平面波扩展（PWE）方法和Supercell方法来计算具有六边形光学原子的光子晶体平板（PCS）的能带图。具有六角形光学原子的孔型PCS在类似TE的模式下的第一带隙宽度与其二维（2D）对应物的宽度几乎相同。但是，具有六边形光学原子的柱型PCS的第一带隙与其2D对应物的第一带隙相比明显缩小。具有正常六边形光学原子的孔型PCS对于TE类模态的第一带隙比具有正交六边形光学原子的空穴更宽。具有正六边形和正交六边形光学原子的PCS具有的带隙可以与具有圆形光学原子的PCS相比。因此，它们是制造PC设备的合适结构。线缺陷PC波导的色散曲线也通过PWE方法和supercell方法计算得出，并讨论了几种潜在的调制其色散曲线的方法。事实证明，调制线缺陷的宽度和沿线缺陷的光学原子的尺寸是获得具有大带宽的单模线缺陷PC波导的有效方法。

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