| 二维光子晶体T型波导分支器数值模拟研究 |
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| 引用本文： | 黄琳,李永东,刘纯亮.二维光子晶体T型波导分支器数值模拟研究[J].光学技术,2010,36(5). |
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| 作者姓名： | 黄琳 李永东 刘纯亮 |
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| 摘 要： | 采用平面波展开法和时域有限差分法,对GaAs二维正方晶格光子晶体的色散特性和带隙结构进行了数值模拟研究,并对GaAs二维光子晶体线缺陷构成的T型波导分支器的微波传输特性进行了模拟和优化。数值模拟结果表明,光子晶体填充比对带隙结构有显著地影响。通过在拐角处插入额外的电介质棒对GaAs二维正方光子晶体T型波导分支器进行优化,数值模拟的结果表明,优化的GaAs二维正方光子晶体T型波导分支器在一阶带隙范围内透射系数将提高到0.96以上。
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| 关 键 词： | 二维光子晶体 数值模拟 带隙结构 传输特性 |
Numerical investigation of T-shaped waveguide splitter in two-dimensional photonic crystals |
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| HUANG Lin,LI Yongdong,LIU Chunliang.Numerical investigation of T-shaped waveguide splitter in two-dimensional photonic crystals[J].Optical Technique,2010,36(5). |
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| Authors: | HUANG Lin LI Yongdong LIU Chunliang |
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| Abstract: | The dispersion properties and bandgap structure of infinite two-dimensional GaAs square lattice photonic crystals are simulated through plane wave expansion method and finite difference time domain method.The microwave transmission characteristics of GaAs photonic crystal T-shaped splitter are simulated and optimized.Numerical simulation results show that the bandgap structure is determined mainly by ratio of the post radius to the post spacing.Two-dimensional GaAs square lattice photonic crystal T-shaped splitter is optimized by inserting extra dielectric rods in the corner.The transmission coefficient of this optimized structure could be more than 0.96 within the first bandgap. |
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| Keywords: | two-dimensional photonic crystals numerical simulation bandgap structure transmission characteristic |
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