Uchida N
Appl Opt. 1976 Jan 1;15(1):179-82. doi: 10.1364/AO.15.000179.
Mode propagation and field distribution in a strip-loaded waveguide are analyzed for the case where the refractive index of the loading film is higher than that of the waveguide. It is found that the propagation constant is remarkably changed by loading the film with the thickness around the cutoff. As a result, the effect of the optical energy confinement below the strip film is large compared with the previously proposed case where the low-index film is loaded, and the use of the high refractive-index film as the loading strip is very attractive for constructing a three-dimensional waveguide structure.
对于负载薄膜的折射率高于波导折射率的情况，分析了条形负载波导中的模式传播和场分布。研究发现，通过加载厚度接近截止值的薄膜，传播常数会发生显著变化。结果表明，与先前提出的加载低折射率薄膜的情况相比，条形薄膜下方的光能限制效应较大，并且使用高折射率薄膜作为负载条形对于构建三维波导结构非常有吸引力。
