Gap modes of one-dimensional photonic crystal surface waves.
Gap modes of one-dimensional photonic crystal surface waves.
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DOI：
10.1364/ao.44.004398
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发表时间：
2005-07
期刊：
影响因子：
1.9
通讯作者：
D. Pile
中科院分区：
文献类型：
--
作者：
D. Pile
采用时域有限差分法分析了两个截断的一维光子晶体表面模之间的耦合。研究了耦合表面模的波矢、场分布和存在条件。对称的间隙模式的波矢随着间隙宽度的减小而增大，而反对称模式的波矢则随着间隙宽度的减小而减小，这与由电介质间隙隔开的金属半空间上的表面等离子体激元的情况正好相反。光子晶体间隙模可以方便而有效地用作无耗散间隙模波导。
The finite-difference time-domain method is employed for the analysis of coupling of the surface modes of two truncated one-dimensional photonic crystals separated by a gap. The wave vector, field distributions, and existence conditions of the coupled surface modes are investigated. The wave vector of symmetric gap modes increases with decreasing gap width, while that of antisymmetric modes decreases-exactly opposite of the situation for surface plasmons on metallic half-spaces separated by a dielectric gap. Photonic crystal gap modes could easily and effectively be used as nondissipating gap-mode waveguides.