Design and performance analysis of integrated focusing grating couplers for the transverse-magnetic TM00 mode in a photonic BiCMOS technology

IF 1.9 4区物理与天体物理 Q3 OPTICS

Journal of the European Optical Society-Rapid Publications Pub Date : 2020-04-08 DOI:10.1186/s41476-020-00129-4

Galina Georgieva, Karsten Voigt, Anna Peczek, Christian Mai, Lars Zimmermann

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Abstract

Focusing grating couplers for the excitation of the fundamental transverse-magnetic (TM) mode in integrated silicon photonic waveguides are designed and characterized under the boundary conditions of a photonic BiCMOS foundry. Two types of waveguide geometries are considered – a nanowire and a rib waveguide. Wafer-scale experimental results for nanowire TM grating couplers are in excellent agreement with numerical investigations and demonstrate a robust behavior on the wafer. The mean coupling loss and the 3σ interval are -3.9?±?0.3?dB. The on wafer variation is three times lower than for the fundamental transverse-electric (TE) polarization. Similarly, the coupling in rib waveguides is examined as well. The results indicate that the rib waveguides require a modified geometry when designed for TM. In general, the nanowire waveguide type is more suitable for TM coupling, showing a stable and repeatable performance.

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光子BiCMOS技术中横磁TM00模式集成聚焦光栅耦合器的设计与性能分析

在光子BiCMOS铸造厂的边界条件下，设计了用于集成硅光子波导基基横磁(TM)模式激励的聚焦光栅耦合器，并对其进行了表征。考虑了两种类型的波导几何形状-纳米线和肋波导。纳米线TM光栅耦合器的晶圆尺度实验结果与数值研究结果非常吻合，并且在晶圆上表现出鲁棒性。平均耦合损耗和3σ区间为-3.9±0.3 dB。晶片上的变化比基本的横向电(TE)极化低三倍。同样地，我们也研究了肋波导中的耦合。结果表明，肋波导在设计时需要修改几何形状。总的来说，纳米线波导类型更适合于TM耦合，表现出稳定和可重复的性能。

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来源期刊

Journal of the European Optical Society-Rapid Publications 物理-光学

CiteScore

2.40

自引率

0.00%

发文量

审稿时长

5 weeks

期刊介绍： Rapid progress in optics and photonics has broadened its application enormously into many branches, including information and communication technology, security, sensing, bio- and medical sciences, healthcare and chemistry. Recent achievements in other sciences have allowed continual discovery of new natural mysteries and formulation of challenging goals for optics that require further development of modern concepts and running fundamental research. The Journal of the European Optical Society – Rapid Publications (JEOS:RP) aims to tackle all of the aforementioned points in the form of prompt, scientific, high-quality communications that report on the latest findings. It presents emerging technologies and outlining strategic goals in optics and photonics. The journal covers both fundamental and applied topics, including but not limited to: Classical and quantum optics Light/matter interaction Optical communication Micro- and nanooptics Nonlinear optical phenomena Optical materials Optical metrology Optical spectroscopy Colour research Nano and metamaterials Modern photonics technology Optical engineering, design and instrumentation Optical applications in bio-physics and medicine Interdisciplinary fields using photonics, such as in energy, climate change and cultural heritage The journal aims to provide readers with recent and important achievements in optics/photonics and, as its name suggests, it strives for the shortest possible publication time.