发表机构
University of Graz; Christian Doppler Laboratory for Structured Matter Based Sensing; University of Glasgow; Sant’Anna School of Advanced Studies（格拉茨大学; 基于结构化物质的传感克劳斯·多普勒实验室; 格拉斯哥大学; 圣安娜高等研究学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对可见光光子集成线路的集成密度与带宽瓶颈，采用基于伴随法、考虑可制造性的逆向设计工作流程，扩展FDTDX功能构建高效平台，在氮化硅平台上设计验证了超紧凑宽带器件，为高性能可见光光子集成线路提供可扩展框架。
AI 中文摘要
工作在可见光光谱范围的光子集成线路（PICs）对量子技术、光学传感和非线性光学应用至关重要。然而，受限于低折射率对比度和基于直觉的PIC设计中受限的参数空间，其发展受到集成密度和工作带宽的阻碍。我们针对可见光光子学，采用基于伴随法、考虑可制造性的逆向设计工作流程解决这些瓶颈。通过扩展开源GPU加速FDTD求解器FDTDX的功能，我们提供了一个通用的内存和运行时高效的逆向设计平台。在氮化硅（Si₃N₄）平台上验证该方法，我们设计、制造并实验验证了用于光路由、复用和偏振控制的超紧凑宽带器件。本工作为高密度、高性能可见光PICs提供了可扩展框架。
英文摘要
Photonic integrated circuits (PICs) operating in the visible spectral range are crucial for quantum technologies, optical sensing, and nonlinear optics applications. However, their development is hampered by limited integration density and operational bandwidth, linked to low refractive index contrast and restricted parameter space in intuition-based PIC design. We address these bottlenecks with an adjoint-based, fabrication-aware inverse design workflow tailored for visible-spectrum photonics. By expanding the capabilities of FDTDX, an open-source, GPU-accelerated FDTD solver, we provide a versatile memory and runtime efficient inverse design platform. Demonstrating this approach on a silicon nitride (Si3N4) platform, we design, fabricate, and experimentally validate ultra-compact, broadband components for light routing, multiplexing, and polarization control. This work provides a scalable framework for high-density, high-performance visible-light PICs.
CommentsMain text: 14 pages, 10 figures; Supplementary document: 4 pages, 6 figures
