Artificial gauge fields the control over the dynamics of uncharged particles by engineering the potential landscape such that the particles behave as if effective external fields are acting on them. Recent years have witnessed a growing interest in artificial gauge fields generated either by the geometry or by time-dependent modulation, as they have been enablers of topological phenomena and synthetic dimensions in many physical settings, e.g., photonics, cold atoms, and acoustic waves. Here, we formulate and experimentally demonstrate the generalized laws of refraction and reflection at an interface between two regions with different artificial gauge fields. We use the symmetries in the system to obtain the generalized Snell law for such a gauge interface and solve for reflection and transmission. We identify total internal reflection (TIR) and complete transmission and demonstrate the concept in experiments. In addition, we calculate the artificial magnetic flux at the interface of two regions with different artificial gauge fields and present a method to concatenate several gauge interfaces. As an example, we propose a scheme to make a gauge imaging system—a device that can reconstruct (image) the shape of an arbitrary wavepacket launched from a certain position to a predesigned location.

人工仪表场通过设计势能场来控制不带电粒子的动力学，这样粒子的行为就好像有效的外部场正在作用在其上。近年来，目睹了对由几何形状或与时间相关的调制生成的人工规格场的兴趣日益增长，因为它们已成为拓扑现象和许多物理环境（例如光子，冷原子和声波）中的合成尺寸的促成因素。在这里，我们公式化并通过实验证明了在具有不同人工规格场的两个区域之间的界面处的折射和反射的一般规律。我们使用系统中的对称性获得此类量规界面的广义斯涅尔定律，并求解反射和透射。我们确定全内反射（TIR）并完成透射，并在实验中演示该概念。此外，我们计算了两个具有不同人工规范磁场的区域的界面处的人造磁通量，并提出了一种连接多个规范界面的方法。例如，我们提出了一种制造量规成像系统的方案，该系统可以重建（成像）从某个位置发射到预定位置的任意波包的形状。