We study the theoretical formation of optical vortices using a nanostructured gradient index phase mask. We consider structures composed of spatially distributed thermally matched glass nanorods with high and low refractive indices. Influence of effective refractive profile distribution, refractive index contrast of component glasses and charge value on the quality of generation of vortices are discussed. A trade-off between waveguiding and phase modulation effects for various refractive index contrast is presented and analysed.

中文翻译：

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纳米结构相位掩模产生光学涡旋的数值分析。

我们研究了使用纳米结构梯度折射率相位掩模的光学涡旋的理论形成。我们考虑由具有高和低折射率的空间分布的热匹配玻璃纳米棒组成的结构。讨论了有效折射率分布，成分玻璃的折射率对比度和电荷值对涡旋产生质量的影响。提出并分析了各种折射率对比下波导和相位调制效果之间的权衡。