正三角形晶格金属柱光子带隙结构

Metal photonic band gap structures formed by triangular arrays

摘要: 采用有限差分法分析了正三角形晶格金属柱光子带隙(PBG)结构中TE模式的色散特性，导出了全局带隙分布图, 探讨了一套系统的设计指定本征频率PBG结构的方法。结果表明，金属柱半径与晶格常数的比值越小，越有利于PBG谐振腔的圆波导耦合输出。说明了类比圆柱波导设计回旋管的可能性。
- 光子带隙 /
- 金属柱 /
- 谐波 /
- 回旋管
Abstract: The finite-difference method is used to analyze the dispersion characteristics of two-dimensional photonic band gap (PBG) structures formed by triangular arrays of metal posts. The global band gaps for TE modes are derived. The method of designing PBG structures with specific eigen-frequency is obtained. It is shown that for the convenience of coupling the power out of the PBG cavity, the ratio of post radius to lattice constant should be as small as possible. The results also prove that it is possible to design a gyrotron with PBG cavities analogous to conventional cylindrical cavities.
- photonic band gap /
- metal post /
- harmonic /
- gyrotron

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