Square-structured photonic bandgap fibers
Square-structured photonic bandgap fibers
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DOI：
10.1016/j.optcom.2004.02.051
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发表时间：
2004-05
影响因子：
2.4
通讯作者：
Ming-Yang Chen;Rongjin Yu
中科院分区：
文献类型：
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作者：
Ming-Yang Chen;Rongjin Yu
二维光子晶体的三种基本构型是正方形、三角形和蜂窝结构。过去，光子带隙光纤主要采用三角形和蜂窝结构。本文研究了利用方形结构构建光子带隙光纤的可能性。发现如果在光纤中引入适当的缺陷，也可以构造出正方形结构的光子带隙光纤。特别地，用平面波展开法和紧凑二维时域有限差分法分别计算了所提带隙光纤的带隙特性和场分布。数值结果表明，可以获得与蜂窝结构带隙相当的方形结构光子带隙光纤，从而证实了所提出的光子带隙光纤在空气中的波导能力。
The three basic configurations of two-dimensional photonic crystals are square, triangular, and honeycomb structures. In the past, triangular and honeycomb structures were used to construct photonic bandgap fibers. In this paper, the possibility of employing a square structure for constructing photonic bandgap fibers is investigated. It is found that square-structured photonic bandgap fibers can also be constructed if proper defects are introduced into the fibers. In particular, the bandgap property and field distribution of the proposed bandgap fibers are calculated with the plane-wave expansion approach and the compact two-dimensional finite-difference time-domain method, respectively. Numerical results demonstrate that square-structured photonic bandgap fibers with bandgaps comparable to those of honeycomb structures can be achieved, which, in turn, confirms the waveguidance ability (in air) of the proposed photonic bandgap fibers.