Exploration of the flatband in photonics is fundamentally important, aiming to control the localization of light for potential applications in optical communications. Herein, the flatband physics is studied in a synthetic space including the frequency axis of light. A ring‐resonator array is used to construct a synthetic Lieb‐type lattice, where the modulation phase distribution supports a locally non‐zero effective magnetic flux pointing into the synthetic space. It is found that the flatband is isolated from other dispersive bands and the light can still be localized even with perturbation from the group velocity dispersion of the waveguide. This work points out a route towards manipulating the localization performance of a wavepacket of light along both the spatial dimension and the frequency dimension, which holds the potential implication for controlling the storage of optical information in dispersive materials.

中文翻译：

---

包含频率维度的合成空间中具有有效磁通量的隔离光子平坦带

光子学中平坦带的探索从根本上来说很重要，旨在控制光的定位以用于光通信中的潜在应用。在此，在包括光的频率轴的合成空间中研究平带物理。环形谐振器阵列用于构造合成的利勃型格子，其中调制相位分布支持指向合成空间的局部非零有效磁通量。发现平坦带与其他色散带隔离，并且即使受到波导的群速度色散的干扰，光仍然可以被定位。这项工作指出了一条沿着空间维度和频率维度操纵光波包的定位性能的途径，