Topology have prevailed in a variety of branches of physics. And topological defects in cosmology are speculated akin to dislocation or disclination in solids or liquid crystals. With the development of classical and quantum simulation, such speculative topological defects are well-emulated in a variety of condensed matter systems. Especially, the underlying theoretical foundations can be extensively applied to realize novel optical applications. Here, with the aid of transformation optics, we experimentally demonstrated bound vortex light on optical chips by simulating gauge fields of topological linear defects in cosmology through position-dependent coupling coefficients in a deformed photonic graphene. Furthermore, these types of photonic lattices inspired by topological linear defects can simultaneously generate and transport optical vortices, and even can control the orbital angular momentum of photons on integrated optical chips.

拓扑学在物理学的各个分支中盛行。并且推测宇宙学中的拓扑缺陷类似于固体或液晶中的位错或向错。随着经典模拟和量子模拟的发展，这种推测性的拓扑缺陷在各种凝聚态系统中得到了很好的模拟。特别是，基础理论基础可以广泛应用于实现新的光学应用。在这里，借助变换光学，我们通过变形光子石墨烯中的位置相关耦合系数模拟宇宙学中拓扑线性缺陷的规范场，在光学芯片上实验证明了束缚涡旋光。此外，受拓扑线性缺陷启发的这些类型的光子晶格可以同时产生和传输光学涡旋，