论文标题
耦合$ si_3n_4 $ waveGuide使用转换光学器件到Soi WaveGuide
Coupling $Si_3N_4$ waveguide to SOI waveguide using transformation optics
论文作者
论文摘要
氮化硅（$ si_3n_4 $）平面波导平台与硅启动器（SOI）设备相结合，提供了新一代新一代的芯片上系统应用程序。因此，必须有效地将$ SI_3N_4 $ WAVEGUIDE与Soi WaveGuide的有效耦合。我们提出一个耦合器，以1.8 $ $ $ $ $ $ SI_3N_4 $ WAVEGUIDE至0.5 $ $ $ $ $ $ - 基于Luneburg镜头的聚焦属性。为了使波导的折射率与镜头的边缘匹配，镜头的一侧用准符合形式转换光学元件扁平。设计的耦合器由分级光子晶体实现。三维数值模拟表明，1.93 $μm$ $ $的耦合器的平均耦合损失在C波段中为0.13 dB。
Silicon nitride ($Si_3N_4$) planar waveguide platform combined with silicon-on-insulator (SOI) devices offer a whole new generation of system-on-chip applications. Therefore, efficient coupling of an $Si_3N_4$ waveguide to an SOI waveguide is essential. We present a coupler to interface a 1.8 $μm$-wide $Si_3N_4$ waveguide to a 0.5 $μm$-wide SOI waveguide based on the focusing property of the Luneburg lens. In order to match the refractive indices of the waveguides with the edges of the lens, one side of the lens is flattened with quasi-conformal transformation optics. The designed coupler is implemented by graded photonic crystals. The three-dimensional numerical simulations indicate that the 1.93 $μm$-long coupler has an average coupling loss of 0.13 dB in the C-band.
