材料科学
光学
光束转向
光子集成电路
波导管
硅光子学
纳米光子学
光开关
折射率
作者
Dries Vercruysse,Neil V. Sapra,Ki Youl Yang,Jelena Vuckovic
出处
期刊:ACS Photonics
[American Chemical Society]
日期:2021-10-20
卷期号:8 (10): 3085-3093
被引量:3
标识
DOI:10.1021/acsphotonics.1c01119
摘要
The ability of photonic crystal waveguides (PCWs) to confine and slow down light makes them an ideal component to enhance the performance of various photonic devices, such as optical modulators or sensors. However, the integration of PCWs in photonic applications poses design challenges, most notably, engineering the PCW mode dispersion and creating efficient coupling devices. Here, we solve these challenges with photonic inverse design, and experimentally demonstrate a slow-light PCW optical phased array (OPA) with a wide steering range. Even and odd mode PCWs are engineered for a group index of 25, over a bandwidth of 20nm and 12nm, respectively. Additionally, for both PCW designs, we create strip waveguide couplers and free-space vertical couplers. Finally, also relying on inverse design, the radiative losses of the PCW are engineered, allowing us to construct OPAs with a 20° steering range in a 20nm bandwidth.
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