Dielectric slot embedded metal cavity waveguides
Dielectric slot embedded metal cavity waveguides
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DOI：
10.1016/j.optcom.2014.03.026
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发表时间：
2014-08
影响因子：
2.4
通讯作者：
C. Jeong;Sangin Kim
中科院分区：
文献类型：
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作者：
C. Jeong;Sangin Kim
系统地研究了一种介质缝隙嵌入金属腔波导，它是在金属-介质-金属（MDM）波导的中心嵌入一个薄缝隙。在通信波长λ 0 =1.55 μm处进行了解析和数值计算，结果表明，引入缝隙同时改善了MDM波导的模式限制和传输距离。研究还表明，在高折射率介质基片上的平面二维波导中，可以实现深亚波长模式限制（~10−5（λo/2）2），而大部分场仍然限制在缝隙区域中。我们相信，槽嵌入式金属腔波导将有助于实现超紧凑的光电子器件在各种应用的纳米光子学通过放宽MDM波导中的模式面积和传播距离之间的权衡。
We systematically investigate a dielectric slot embedded metal cavity waveguide, which consists of a thin slot embedded in the center of a metal–dielectric–metal (MDM) waveguide. Analytical and numerical calculations are carried out at the telecommunication wavelengthλo=1.55 μm and it is shown that introducing the slot simultaneously improves the modal confinement and the propagation distance of the MDM waveguide. It is also shown that a deep subwavelength modal confinement (~10−5(λo/2)2) can be achieved in a form of planar two-dimensional waveguide on a high-index dielectric substrate with most of the field still confined in a slot region. We believe that the slot embedded metal cavity waveguide will help realize ultra-compact optoelectronic devices in various applications of nanophotonics by relaxing the trade-off between the mode area and propagation distance in the MDM waveguide.