Markov Petr, Valentine Jason G, Weiss Sharon M
Department of Electrical Engineering and Computer Science, Vanderbilt University, 37235, USA.
Opt Express. 2012 Jun 18;20(13):14705-13. doi: 10.1364/OE.20.014705.
An integrated silicon photonics coupler for fiber to waveguide conversion was designed employing a transformation optics approach. Quasi-conformal mapping was used to obtain achievable material properties, which were realized by a distorted hexagonal lattice of air holes in silicon. The coupler, measuring only 10 μm in length and fabricated with a single-step lithography process, exhibits a peak simulated transmission efficiency of nearly 100% for in-plane mode conversion and a factor of 5 improvement over butt coupling for fiber to waveguide mode conversion in experimental testing.
采用变换光学方法设计了一种用于光纤到波导转换的集成硅光子耦合器。利用准共形映射来获得可实现的材料特性，这通过硅中气孔的扭曲六边形晶格来实现。该耦合器长度仅为10μm，采用单步光刻工艺制造，在平面内模式转换方面模拟传输效率峰值接近100%，在实验测试中，与光纤到波导模式转换的对接耦合相比，性能提高了5倍。
