Waveguide interconnect coupling control is essential for enhancing the chip density of photonic integrated circuits to incorporate a growing number of components. However, a critical engineering challenge is to achieve both strong waveguide isolation and efficient long‐range coupling on a single chip. Here, a novel photonic supercoupling phenomenon is demonstrated for waveguide coupling over separation distances from a quarter to five wavelengths (λ), leveraging the tunable mode tails and the vortex energy flow in topological valley Hall system. A supercoupled integrated chip is developed, realizing a 91% coupling ratio and a −30 dB isolation over 2.8λ waveguide separations simultaneously. Supercoupled devices are further showcased including a waveguide‐cavity system with 3.2λ excitation distance, and a waveguide directional supercoupler with a compact coupling area of nearly λ2/4, which outperform conventional devices. Supercoupling provides new degrees of freedom for optimizing coupling and isolation between photonic integrated components, facilitating new applications in on‐chip sensing, lasing, and telecommunications.

中文翻译：

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硅拓扑波导中的光子超耦合


波导互连耦合控制对于提高光子集成电路的芯片密度以整合越来越多的元件至关重要。然而，一个关键的工程挑战是在单个芯片上同时实现强大的波导隔离和高效的远程耦合。在这里，利用拓扑谷霍尔系统中的可调谐模式尾部和涡流能量流，展示了一种新的光子超耦合现象，波导耦合距离为 1/4 到 5 个波长 （λ）。开发了一种超耦合集成芯片，可在 2.8λ 波导分离上同时实现 91% 的耦合比和 −30 dB 的隔离。此外，还展示了超耦合器件，包括激发距离为 3.2λ 的波导腔系统，以及耦合面积接近 λ2/4 的波导定向超级耦合器，其性能优于传统器件。超级耦合为优化光子集成元件之间的耦合和隔离提供了新的自由度，促进了片上传感、激光和电信领域的新应用。