ABSTRACT An engineered silicon rib waveguide on Silicon-On-Insulator platform which can act as virtual photonic bandgap structure is proposed. Selective periodic etching of materials from a rib waveguide is done to create a periodic rib-ridge structure. Each of the rib-ridge sections will therefore have different effective refractive indices and will act as virtual multilayered periodic structure or one-dimensional photonic bandgap structure. Their spatial positions and widths can be controlled to realize different type of photonic filters for integrated photonics applications. Realization of narrowband, multi-band and band-pass filter are shown here. These types of waveguide based monomaterial optical filters avoid the challenges generally faced while fabricating multilayer structures of different heterogeneous materials having different refractive indices. Moreover, as the device is waveguide based, its size is very small and will be useful for compact integrated photonics.

中文翻译：

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硅波导作为虚拟光子带隙结构阵列，用于实现紧凑型光学滤波器

摘要 提出了一种在绝缘体上硅平台上设计的硅肋波导，它可以充当虚拟光子带隙结构。对来自肋形波导的材料进行选择性周期性蚀刻以创建周期性的肋脊结构。因此，每个肋脊部分将具有不同的有效折射率，并将充当虚拟多层周期结构或一维光子带隙结构。可以控制它们的空间位置和宽度，以实现用于集成光子学应用的不同类型的光子滤波器。这里展示了窄带、多带和带通滤波器的实现。这些类型的基于波导的单材料滤光器避免了在制造具有不同折射率的不同异质材料的多层结构时通常面临的挑战。此外，由于该器件是基于波导的，因此其尺寸非常小，对于紧凑型集成光子学非常有用。