Wang Wenhao, Shen Zhonglei, Tan Yi Ji, Chen Kaiji, Singh Ranjan
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore, Singapore.
Light Sci Appl. 2025 Sep 18;14(1):330. doi: 10.1038/s41377-025-02017-3.
Confining light in an on-chip photonic cavity with strong light-matter interactions is pivotal for numerous applications in optical and quantum sciences. Recently, topological valley photonics has introduced new schemes for light confinement with topological protection, enabling robust on-chip light manipulation. Here, we present a topological edge state cavity that confines light within a topological bandgap while robustly guiding it to circulate around the cavity via topological edge states. We demonstrate a giant enhancement in the intrinsic quality factor by three orders of magnitude, while simultaneously increasing the free spectral range from 5.1 to 7.1 GHz through tailoring the radiation leakage and group index of topological valley edge state. Our work provides a novel and robust on-chip cavity platform for a wide range of applications, including high-capacity communications, nonlinear optics, atomic clocks, and quantum photonics.
在具有强光与物质相互作用的片上光子腔中限制光，对于光学和量子科学中的众多应用至关重要。最近，拓扑谷光子学引入了具有拓扑保护的光限制新方案，实现了强大的片上光操纵。在此，我们展示了一种拓扑边缘态腔，它将光限制在拓扑带隙内，同时通过拓扑边缘态稳健地引导光围绕腔循环。我们证明了本征品质因数大幅提高了三个数量级，同时通过调整拓扑谷边缘态的辐射泄漏和群折射率，将自由光谱范围从5.1 GHz增加到7.1 GHz。我们的工作为包括高容量通信、非线性光学、原子钟和量子光子学在内的广泛应用提供了一个新颖且稳健的片上腔平台。
